Tum Tang at a glance
| Feature | What to expect |
|---|---|
| Base | Fresh cucumber, cut into strips and lightly bruised |
| Flavour | Chilli heat, lime sharpness and a salty dressing. This recipe adds tamarind and fermented fish seasoning. |
| Texture | Juicy cucumber with enough bite to stand up to the dressing |
| Home recipe | Serves 3 as a side. Contains fish and crustaceans. |
What is Tum Tang?
The Thai word ตำ refers to pounding, and แตง refers to the cucumber here. You’ll also see the dish written as Tam Taeng or Som Tum Tang. Press the cucumber lightly enough to bruise it, then turn it through the dressing. The strips should still look like cucumber when they reach the plate. T1 T2 T4 T5 E1 E2
Thai recipes document cucumber versions with pla ra, a fermented fish seasoning. Recipes associated with Isan, in north-eastern Thailand, and with Laos share the mortar method. The available sources describe versions of the dish and leave its exact place and date of invention unverified. T1 T2 T3 E1 E3
The base helps you tell related salads apart. Som Tum green papaya salad has firmer shreds, while cucumber gives Tum Tang a juicier bite. Our Yum Pak vegetable salad guide covers a tossed side salad. See the Thai food guide for more salads and how they fit into a meal. T1 T4 E1 E2

Tum Tang ingredients and substitutions
| Ingredient | Role | What you can change |
|---|---|---|
| Cucumber | Juicy, crisp strips form the base. | Use a firm supermarket cucumber or small cucumbers. Peel tough skin if needed. |
| Tomatoes and green beans | Tomato juice blends into the dressing. The beans give it a firmer bite. | Yardlong beans appear in other versions. Follow the preparation instructions for the beans you buy. |
| Garlic and fresh Thai chillies | Pounding releases the garlic’s aroma and breaks up the chillies. | Start at the low end of the chilli range for gentler heat. |
| Lime, tamarind and sugar | Lime gives a sharp edge, tamarind adds a rounder sourness, and sugar balances both. | Try a little more lime if you omit tamarind. Concentrated tamarind products vary, so check the label. |
| Fish sauce and pla ra | Both bring salt and savoury flavour. Pla ra adds a stronger fermented note. | For a fish-sauce-only style, omit pla ra and adjust the seasoning after tasting. For this recipe, choose a bottled pla ra product suitable for use without further cooking. |
| Dried prawns | Small pieces give the salad a concentrated savoury flavour. | Use a product suitable for the preparation and follow the pack instructions. Leaving them out changes the flavour. |
Roasted peanuts are used in some recipes and in the Charm Thai Cafe version. They add a separate crunch. The measured home recipe here follows Suwanee’s main ingredient list, which leaves them out. T1 T2 T3 E1 E2 E3 C1
Isan-style Tum Tang home recipe
Adapted from Suwanee’s Isaan Cucumber Salad. The quantities below use rounded metric equivalents, based on 240 ml per cup. The recipe serves three as a side. Use a deep mortar, a pestle, a spoon, a sharp knife and a clean chopping board. A tablespoon is 15 ml and a teaspoon is 5 ml. E1 U1
Ingredients
- 720 ml cucumber strips, loosely measured (3 US cups)
- 80 ml green beans, cut into roughly 2.5 cm pieces
- 120 ml cherry tomatoes, halved
- 1 to 2 garlic cloves, peeled
- 1 to 10 fresh Thai chillies, according to taste. Start with 1 if you’re unsure.
- 1 tbsp fish sauce (15 ml)
- 2 tbsp sugar
- 1½ tbsp fresh lime juice (22.5 ml)
- 1 tbsp tamarind purée (15 ml), checking the strength on the label
- 1 tbsp ready-to-use bottled pla ra (15 ml)
- 2½ tbsp dried prawns, prepared according to the pack
Method
- Prepare the vegetables. Wash and drain the produce. Cut the cucumber into thin, sturdy strips and halve the tomatoes. Prepare the beans as directed on their pack. If they require cooking, cool and chill them before adding them to the salad.
- Crush the aromatics. Put the garlic and chillies in the mortar and tap until they break up into rough pieces.
- Mix the dressing. Add the fish sauce, sugar, lime juice, tamarind and pla ra. Stir and press with the pestle until the sugar is mostly dissolved.
- Bruise the tomatoes and beans. Add them and press until some tomato juice runs into the dressing. Keep the vegetables in recognisable pieces.
- Dress the cucumber. Add the strips and dried prawns. Lift the cucumber with a spoon between light taps of the pestle. Stop once the strips are lightly bruised and coated. Let them sit for two to three minutes while you get the plate ready, then serve.
Allergens in this recipe. Fish sauce and pla ra contain fish. Dried prawns are crustaceans. Read the ingredient lists and any cross-contact statements on the products you use. E1 U3
What to serve with Tum Tang
Serve it with sticky rice, jasmine rice or rice vermicelli. For a shared meal, put it beside grilled chicken and let people take a spoonful of salad between bites of rice. The dressing is worth bringing to the table, so spoon some over the cucumber as you plate it. T7 E1
Keep the cucumber crisp
Cut the strips thick enough to hold their shape. Add them after the dressing and tomatoes, and turn them just until coated. If you’re preparing the salad ahead, cover and chill the cut vegetables and the dressing separately, then combine close to serving. T1 T2 E1 E2 U2
60 Tum Tang questions
Name, definition and origins
1. What is Tum Tang?
Tum Tang is a pounded cucumber salad. Chilli and a tangy dressing season the cucumber, which is lightly bruised so it keeps its bite. T1 T2 E1
Link to this question2. Are Tum Tang and Tam Taeng the same dish?
3. What does Tum Tang mean in Thai?
Tum refers to pounding, and tang refers to the cucumber used as the base of this salad. T1 T4 T5
Link to this question4. How do you pronounce Tum Tang?
An approximate pronunciation is “dtam taeng”. Use a light t sound at the start and hold the vowel a little longer in “taeng”. T5 T6
Link to this question5. What is Thum Mak Thang?
It is a name used for Lao pounded cucumber salad. Praew’s Lao recipe combines cucumber and tomatoes with lime, fish sauce, fermented fish sauce and chilli. E3
Link to this questionTaste, heat and texture
7. What does Tum Tang taste like?
Expect a crisp, juicy bite with chilli heat, sourness from lime and saltiness from the seasoning. A little sugar rounds off the sharper flavours. T1 E1 E2
Link to this question8. What does fermented fish seasoning taste like in the salad?
Pla ra adds a strong savoury, fermented note that comes through alongside the lime. Taste a little on a cucumber strip to judge the balance. T1 E1 E3
Link to this question9. How hot should homemade Tum Tang be?
Make it as hot as you enjoy. Start with one Thai chilli in the featured recipe and add more only after tasting the dressed cucumber. E1 E3
Link to this question10. Will the same number of chillies always give the same heat?
Chilli heat varies, even between chillies bought together. Work upwards from the lower end of the recipe’s range. E1 E3
Link to this question11. What texture should the cucumber have?
The strips should bend a little after bruising and still give a crisp bite. Stop pounding before they lose their shape. T1 E1
Link to this question12. What makes Tum Tang juicier than green papaya salad?
Fresh cucumber releases juice as you bruise and dress it. Unripe papaya gives the related salad a firmer, drier crunch. T1 T4 E1 E2
Link to this questionIngredients and their roles
13. Why add cherry tomatoes?
Lightly bruised tomatoes give the dressing a little juice and acidity. Halves are easy to press without crushing every piece. T2 E1 E3
Link to this question14. What do green beans add?
They give the salad a firmer bite between the cucumber strips. Use the beans called for by your recipe and follow any cooking instructions on the pack. T2 E1 E3
Link to this question15. Why use both lime and tamarind?
Lime brings a fresh sharpness, and tamarind gives the dressing a deeper sour taste. Some versions use lime as the sole souring ingredient. T1 T2 E1 E3
Link to this question16. Why add sugar to a savoury salad?
Sugar softens the edge of the lime and salty seasonings. Dissolve it in the dressing so its sweetness is spread through the bowl. E1 E2 E3
Link to this question17. What is the difference between fish sauce and pla ra?
Both are fish-based seasonings. Pla ra supplies the more pronounced fermented character called for in the Isan-style recipe here. The recipe uses each in a measured amount. T1 T2 E1 E3
Link to this question18. What do dried prawns add?
They give the dressing a concentrated seafood flavour and add a chewy bite. Check the packet for how to prepare them and for allergen information. E1 U3
Link to this questionShopping, substitutions and preparation
19. What cucumber should I buy?
Choose a firm cucumber. A long supermarket cucumber or small cucumbers work, provided the strips hold their shape when you press them lightly. T3 E1 E2 E3
Link to this question20. Should I peel the cucumber?
Thin skin can stay on. If the skin is tough or bitter, peel it before cutting the flesh into strips. T3 E2
Link to this question21. Should I remove the seeds?
Leave small, tender seeds in. Scoop out a large, loose seed core if it would make the strips too soft or watery. E2 E3
Link to this question22. What can I use in place of yardlong beans?
The featured recipe uses ordinary green beans. Check the pack for preparation instructions and cool cooked beans before mixing them into the cold salad. T2 E1 E3 U2
Link to this question23. Can I use palm sugar instead of granulated sugar?
Yes, as an adaptation. Shave firm palm sugar so it dissolves easily. Other published cucumber versions use palm sugar. T3 E2 E3
Link to this question24. How do I choose bottled pla ra for a cold salad?
Look for a product whose label allows use without further cooking. Check the ingredients for fish and any other allergens and follow the opening and storage directions. T3 E1 U3
Link to this questionMortar technique
25. What equipment do I need?
Use a deep mortar, pestle and spoon, along with a board and sharp knife. Leave enough space in the mortar to turn the strips as you pound. E1 E3
Link to this question26. Can I make Tum Tang without a mortar?
Yes. Crush the garlic and chillies on a clean board, whisk the dressing in a bowl, lightly press the tomatoes and toss everything with the cucumber. E1 E2 U1
Link to this question27. Should I slice or shred the cucumber?
The featured recipe uses narrow strips. A thin slice also works, especially if you prefer a gentler, tossed style. T3 E1 E2 E3
Link to this question28. When do the chillies and garlic go in?
Start by crushing them in the mortar. Small pieces are enough to disperse the flavour when the dressing goes in. T2 E1
Link to this question29. How do I bruise the tomatoes without mashing them?
Halve them, then press the cut pieces just until they release some juice. A few pieces should still be visible in the finished salad. T1 E1 E3
Link to this question30. How do I keep the dressing from splashing out?
Use a deep mortar and press the vegetables with controlled taps. Lift the strips with the spoon to turn them through the dressing. T1 E1
Link to this questionRegional and household variations
31. Does every Tum Tang use pla ra?
Recipes differ. KRUA.CO documents a fermented-fish version, while Susie Thompson publishes a cucumber salad with ordinary fish sauce and lime. T1 E2
Link to this question32. What distinguishes the Lao recipe cited here?
Praew’s version uses both fish sauce and fermented fish sauce with lime, palm sugar and tomatoes. The greens and garnishes differ across published recipes. E1 E3
Link to this question33. What is Tum Tang Korat?
One Thai-language Korat-style recipe combines pla ra with peanuts, dried prawns, fish sauce and tamarind. It illustrates how cooks can mix elements found in different styles. T2
Link to this question34. Can I add roasted peanuts?
Yes. Suwanee suggests crushed peanuts as an optional addition. For extra crunch, scatter them over just before serving. Some other Tum Tang recipes and the Charm Thai Cafe menu version include peanuts. T2 E1 E2 C1
Link to this question35. Can I make a version without dried prawns?
Yes. Praew’s published Lao cucumber salad leaves them out and gets its savoury flavour from two fish-based seasonings. E3
Link to this question36. Can the dressing include rice vinegar?
Some tossed cucumber recipes use rice vinegar alongside lime. That is a separate seasoning style from the featured mortar recipe with tamarind and pla ra. E1 E2
Link to this questionDietary requests and allergens
37. What allergens are in the home recipe?
It contains fish from the fish sauce and pla ra, and crustaceans from the dried prawns. Check all packaged ingredients for any further allergens or precautionary labels. E1 U3
Link to this question38. Are dried prawns and fish sauce the same allergen?
They are different allergen categories. Prawns are crustaceans, while fish sauce contains fish. Check both categories when the dressing or toppings are uncertain. U3
Link to this question39. Does Tum Tang contain peanuts?
40. Can you make Tum Tang vegan?
For a home adaptation, use a plant-based seasoning in place of both fish-based sauces, leave out dried prawns and check all other labels. At Charm Thai Cafe, ask for vegan preparation when ordering. C1 E1 U3
Link to this question41. Can Tum Tang be prepared gluten-free?
It depends on the sauces, other packaged ingredients and preparation. Check product labels at home. At Charm Thai Cafe, ask the team about the current dressing and shared-kitchen handling. C1 U3
Link to this question42. Is it enough to remove peanuts from a served salad?
For a peanut allergy, ask before ordering. Peanuts may already have touched the dressing, plate or preparation equipment, and removing a garnish cannot undo that contact. T2 E1 C1 U3
Link to this questionServing and comparing dishes
43. What rice goes well with Tum Tang?
Sticky rice gives you a chewy bite alongside the crisp cucumber. Jasmine rice is another option, especially if you want to spoon a little dressing over it. E1 E3
Link to this question44. Can I serve it with noodles?
Yes. Suwanee suggests serving the salad with rice vermicelli. Keep the noodles alongside the salad so each person can take as much dressing as they like. E1
Link to this question45. What main dish goes with Tum Tang?
Try it with grilled chicken and rice. The lime and cucumber give a fresh bite alongside the grilled meat. T7
Link to this question46. How is Tum Tang different from Som Tum?
Tum Tang uses cucumber. The familiar green papaya Som Tum uses firm shreds of unripe papaya. The mortar technique is shared and dressings vary. T1 T4 E1 E2
Link to this question47. Is Tum Tang the same as Yum Pak?
They are separate salads on the Charm Thai Cafe menu. Tum Tang centres on pounded cucumber, while the Yum Pak guide covers a tossed vegetable side. C1 E1
Link to this question48. Is every Thai cucumber salad called Tum Tang?
Tum Tang names the pounded cucumber preparation. Thai cucumber dishes also include tossed salads and relishes with their own dressings and uses. T1 E1 E2
Link to this questionTroubleshooting
49. Why has my cucumber gone soft?
Heavy pounding or a long rest in the dressing can soften the strips. Use a firm cucumber, tap lightly and serve soon after mixing. T1 E1 E2
Link to this question50. Why is the dressing watery?
Bruised cucumber and tomato both release juice. Drain the washed vegetables before cutting, add the cucumber last and dress it near serving. E1 E2 E3
Link to this question51. How can I rescue a dressing that’s too salty?
Taste it on a cucumber strip first. If it is still too salty, toss some of the dressing with extra undressed cucumber and leave the excess liquid in the mortar. E1 E2
Link to this question52. How can I tone down too much chilli?
Add more undressed cucumber or serve smaller bites with plain rice. Start with less chilli next time and add it gradually. E1 E3
Link to this question53. How do I fix a dressing that tastes too sweet?
Stir in a little lime juice and taste it with a cucumber strip before adding more. Add it in small amounts so the lime stays in balance. E1 E2 E3
Link to this question54. Why can I still feel grains of sugar?
The sugar needs more time in the wet ingredients. Stir or press it against the mortar before adding the cucumber. E1 E2
Link to this questionStorage, nutrition and ordering
55. Can I prepare Tum Tang ahead?
Wash and cut the vegetables in advance and keep them covered and chilled. Chill the dressing separately, then mix close to serving for the best texture. E1 E2 U1 U2
Link to this question56. How should I store leftover Tum Tang?
Cover it and refrigerate it promptly at 0 to 5°C. Follow the shortest storage instruction on the ingredients used. The dressed cucumber is at its best when eaten fresh. E1 E2 U2
Link to this question57. Should I freeze or reheat Tum Tang?
Serve the salad chilled or freshly made. Freezing or heating spoils the crisp cucumber texture. If you serve it with cooked rice, chill the rice quickly, ideally within an hour, and use it within 24 hours. Reheat rice only once, until steaming throughout. E1 E2 U2 U4
Link to this question58. How many calories are in Tum Tang?
A figure needs a measured recipe and portion size. The amount of sugar, prawns or peanuts, the dressing left on the plate and any rice served alongside all affect the total. E1 E2 C1
Link to this question59. How spicy is the Charm Thai Cafe Tum Tang?
The menu marks it very hot. Tell the team your preferred heat before ordering and ask what preparation is available. C1
Link to this question60. Where can I order Tum Tang in Doncaster?
Look for Tum Tang under Salads on the Charm Thai Cafe menu. For a table, use the booking link below. Tell the team about any allergy before ordering. C1 U3
Link to this questionThai words used in Tum Tang recipes
| Thai | Pronunciation | Meaning |
|---|---|---|
| ตำแตง | dtam taeng | Pounded cucumber salad |
| แตงกวา | taeng gwaa | Cucumber |
| น้ำปลา | naam plaa | Fish sauce |
| ปลาร้า | plaa raa | Fermented fish seasoning |
| มะนาว | ma-naao | Lime |
| พริก | phrik | Chilli |
| กระเทียม | gra-thiam | Garlic |
| ถั่วฝักยาว | thua fak yaao | Yardlong bean |
| กุ้งแห้ง | goong haeng | Dried prawns |
| ถั่วลิสง | thua li-song | Peanut |
These spellings are a rough guide to the sounds. T1 T2 T3 T5
Tum Tang at Charm Thai Cafe
Look for Tum Tang in the Salads section of our menu. The restaurant version has cucumber, fresh chilli, lime juice, tomato and peanuts, and the menu marks it very hot. Ask us about your preferred heat or about vegan or gluten-free preparation when you order. If you have an allergy, tell the team before ordering so we can check the current ingredients and shared-kitchen preparation with you. C1 U3
Sources and further reading
- T1. KRUA.CO, เบสิกส้มตำ จะตำทั้งทีต้องมีอะไรบ้าง พร้อม 9 สูตรแซ่บลืม!. Isan-style fermented seasoning, types of cucumber and related preparations. The prose refers to taeng ran and the measured recipe lists young taeng Thai. Used for style and technique.
- T2. Ti.oung on Wongnai, ตำแตงโตราช. One Korat-style recipe combines pla ra, peanuts, dried prawns, lime and tamarind. Used as an example of a preparation.
- T3. Boomomo on Wongnai, ตำแตงปลาร้า. Cucumber choices, peeling, chilli and the use of cooked fermented fish seasoning.
- T4. Pundit’s Recipe Book on GotoKnow, ส้มตำ. The naming of cucumber and other bases within the pounded salad family.
- T5. Wiktionary, ตำ. Meaning and pronunciation of the Thai verb for pounding.
- T6. Wiktionary, แตง. Thai spelling and pronunciation of taeng. The cucumber meaning here follows the dish context.
- T7. Thai Thai Food, ตำแตงปูดอง. Grilled chicken, sticky rice and noodles as accompaniments to a pounded cucumber salad variant.
- E1. Suwanee, Isaan Cucumber Salad (Tum Tang). Primary home recipe, yield, US measures, gentle pounding, ingredient roles and serving suggestions. The narrative gives peanuts as optional, while the measured list excludes them.
- E2. Susie Thompson, Thai Cucumber Salad (Som Tum Tang) Recipe. Tossed Thai variation, cucumber choices, texture, fish sauce, lime and rice vinegar. Used as a comparison.
- E3. Praew, Lao Cucumber Salad Recipe (Thum Mak Thang). Lao name, fermented and plain fish sauce, recipe without dried prawns, optional vegetables and serving.
- U1. Food Standards Agency, Cleaning and food. Wash produce and clean utensils, with separate equipment for raw foods that require cooking and ready-to-eat food.
- U2. Food Standards Agency, How to chill, freeze and defrost food safely. Chilling temperature, cooling cooked ingredients and storage.
- U3. Food Standards Agency, Food allergy and intolerance advice for consumers. Allergen categories, label checks, cross-contact and eating out.
- U4. Food Standards Agency, Rice and egg food safety guidance. Cooked rice cooling, 24-hour refrigeration and single reheating until steaming.
- C1. Charm Thai Cafe, Menu. Tum Tang ingredients, peanut disclosure, heat, vegan and gluten-free preparation on request, and the restaurant’s photo.