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Thai Mango Salad (Som Tum Mamuang) is a raw salad built on shredded green mango, long beans, herbs, peanuts, and a sharp lime-tamarind dressing. It comes together in about 20 minutes with no cooking required, which makes it one of the fastest substantial salads you can put on a weeknight table.
The short version of why this works
Two things drive this recipe. First, the dressing balance: green mango is already sour, so you need the coconut sugar and soy sauce pulling in the opposite direction or the whole salad tastes flat and acidic. Taste the dressing before it hits the mango and adjust until you can clearly detect both sweet and salty underneath the sour. Second, the shred size matters more than it sounds. Thick matchsticks stay crunchy and hold the dressing on their surface; if you grate the mango too fine it turns mushy fast and the salad goes watery before you finish eating. A julienne peeler or the coarse side of a box grater set to long strokes gives you the right texture in under two minutes.
Troubleshooting
- Salad is swimming in liquid by the time you serve it: Green mango releases moisture once it contacts the dressing. Toss everything together right before serving, not ahead of time. If you prepped the mango early, keep it dry in the fridge and add the dressing at the last moment.
- Dressing tastes one-dimensional: Tamarind and lime are both sour but they are not interchangeable. If you only have one, the dressing will taste thin. Use both, even if you reduce the quantity of each slightly.
- Peanuts go soft: Add them after tossing, not during. Stirring them into the dressed salad even a few minutes early turns them chewy.
- Salad is too spicy to adjust down: More coconut sugar and a squeeze of extra lime will blunt the heat better than adding more mango. Adding bulk without adjusting the dressing just dilutes flavor across the board.
- Long beans are hard to find: Snap them off the stem end and check an Asian grocery first — they are usually very cheap there. In a pinch, raw sugar snap peas cut into 1-inch pieces hold up well and stay crunchy. Skip the garnish of extra herb sprigs on top — not worth the extra dish when the salad already has three herbs mixed in.
Shopping notes
- Green mango: You want unripe, firm, and starchy — not a mango that is just slightly underripe. The flesh should be white or pale yellow and taste tart, not sweet. South and Southeast Asian grocery stores stock these reliably. A fully ripe mango will not work; it turns to mush.
- Tamarind: Tamarind concentrate (the thick paste in a jar) is the fastest option. If you buy a block of tamarind pulp, soak a small piece in hot water for 5 minutes and press it through a strainer before measuring.
- Thai basil: Has a faintly anise flavor that regular Italian basil does not replicate well. Most Asian grocery stores carry it fresh. If you genuinely cannot find it, use extra mint rather than Italian basil.
- Long beans: Also sold as yard-long beans or Chinese long beans. They stay crisper raw than Western green beans and are worth seeking out, but raw sugar snap peas are a solid backup.
Thai Mango Salad (Som Tum Mamuang) – Vibrant Vegan Crunch
Green mango is shredded and tossed in a lime-tamarind dressing seasoned with chilies, coconut sugar, and fish-sauce-free umami, following the Thai som tum mamuang tradition. Toasted peanuts, fresh mint, and Thai basil add crunch and fragrance. It takes around 20 minutes to prepare and is best served immediately.
Equipment
- Chef's knife
- Cutting board
- Vegetable peeler
- Julienne peeler or mandoline
- Mortar and pestle or mini food processor
- Mixing bowls (1 large, 1 small)
- 12-inch skillet or baking sheet (for toasting peanuts)
- Small saucepan and slotted spoon (for blanching beans)
- Citrus juicer
- Measuring cups and spoons
- Tongs
Ingredients
For the Toasted Peanuts:
- ½ cup raw unsalted peanuts toast until golden and aromatic
For the Dressing:
- 2 cloves garlic, peeled fresh; large cloves preferred for sweeter aroma
- 2 pieces Thai bird's eye chilies 2 for medium heat; seed for milder
- 2 tbsp coconut sugar packed; or use palm sugar
- 3 tbsp fresh lime juice about 2 limes; choose heavy, thin-skinned limes
- 1 tbsp tamarind concentrate thin, pourable; adds fruity tang
- 2 tbsp light soy sauce or gluten-free tamari Thai or Japanese light soy for clean salinity
- 1 tbsp unseasoned rice vinegar for bright lift; unseasoned keeps salt in check
- 2 tbsp warm water helps dissolve sugar
For the Salad:
- 2 medium green mangoes about 1.5 lb total; firm and slightly tart
- ½ cup carrot, julienned for color and crunch
- 1 cup cucumber, thinly sliced Persian or English cucumber preferred
- ⅓ cup shallot, thinly sliced soak 5 minutes in cold water for milder bite (optional)
- 1 cup cherry tomatoes, halved choose ripe, firm tomatoes
- 1 cup long beans or green beans, 1-inch pieces blanched and cooled for tender crunch
- ½ cup fresh cilantro leaves loosely packed
- ½ cup fresh mint leaves loosely packed, torn
- ¼ cup Thai basil leaves loosely packed, torn
For Garnish & Serving:
- ⅓ cup toasted peanuts, roughly chopped reserved from peanuts above
- 1 tsp toasted sesame seeds optional
- 4 wedges lime for serving
Instructions
- Toast the Peanuts: Warm a dry 12-inch skillet over medium heat. Add 1/2 cup raw peanuts and toast for 8 minutes, shaking frequently, until golden, glossy, and nutty. Transfer to a plate to cool, then roughly chop. Reserve 1/3 cup for garnish.Oven Alternative: Spread peanuts on a baking sheet and toast at 325°F/165°C for 8–10 minutes, stirring once.
- Make the Dressing: In a mortar and pestle, pound 2 garlic cloves and 2 chilies into a coarse paste. Add 2 tbsp coconut sugar and work it until mostly dissolved and caramel-fragrant. Stir in 3 tbsp lime juice, 1 tbsp tamarind, 2 tbsp soy or tamari, 1 tbsp rice vinegar, and 2 tbsp warm water. Whisk until the sugar fully dissolves. Taste for balance: it should be briskly sour, lightly sweet, and savory. Adjust with a touch more lime (sour), soy (salty), or sugar (sweet) to your liking.No Mortar and Pestle? Finely mince garlic and chilies, then whisk everything in a bowl, or pulse in a mini food processor for a slightly smoother texture.
- Blanch the Beans (optional, for perfect tender-crisp): Bring about 2 quarts of water to a boil (212°F/100°C) in a small saucepan. Salt lightly. Add the 1 cup bean pieces and blanch for 2 minutes until bright green with a snappy bite. Shock in ice water 1 minute, then drain thoroughly.
- Prep the Mango and Vegetables: Peel 2 green mangoes. Using a julienne peeler or mandoline, cut into fine matchsticks. (Alternatively, grate on the large holes of a box grater.) You want crisp, flexible strands—avoid pressing too hard near the pit. Prep the remaining veg: 1/2 cup carrot (julienned), 1 cup cucumber (thinly sliced), 1/3 cup shallot (thinly sliced), and 1 cup cherry tomatoes (halved). Pat the beans dry if blanched.
- Toss and Season: In a large bowl, combine the mango, carrot, cucumber, shallot, cherry tomatoes, beans, and herbs (1/2 cup cilantro, 1/2 cup mint, 1/4 cup Thai basil). Drizzle in about half the dressing and gently toss—lift and turn to avoid bruising the mango. Add more dressing to taste until the shreds look glossy and the salad tastes bright and balanced.
- Finish and Serve: Top with the chopped toasted peanuts and 1 tsp toasted sesame (optional). Mound the salad high in bowls for volume; tuck in extra herb leaves. Serve immediately with lime wedges for a final squeeze.
Notes
Michelle’s Tips:
- Mango Maturity: For a classic tart snap, use firm green mango. If yours is slightly ripe, reduce sugar by 1/2 tsp and add 1 tsp extra lime juice.
- Heat Control: Swap Thai chilies for 1 small red Fresno or 1/2 jalapeño for gentler heat; remove seeds for milder.
- Soy-Free: Use coconut aminos and a big pinch of sea salt to replace soy/tamari; start with 3 tbsp aminos and adjust.
- Nut-Free: Replace peanuts with toasted pumpkin seeds or crushed roasted chickpeas for crunch.
- Umami Boost (vegan “fish sauce” vibe): Add 1 tsp minced nori or 1 tsp white miso to the dressing.
- Faster Caramelization: Warm the coconut sugar with 1 tbsp lime juice before mixing to dissolve quicker.
- Season to your palate’s Thai sweet-sour-salty-spicy balance.
- If serving later, keep dressing and salad separate; toss just before serving to preserve crunch.
Nutrition
Calories: 331kcalCarbohydrates: 42gProtein: 12gFat: 16gSaturated Fat: 3gPolyunsaturated Fat: 4gMonounsaturated Fat: 8gSodium: 594mgPotassium: 790mgFiber: 7gSugar: 25gVitamin A: 4666IUVitamin C: 62mgCalcium: 99mgIron: 2mg
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FAQ
Can I make this salad ahead of time?
You can prep every component ahead, but do not combine them until just before serving. The mango releases liquid quickly once dressed, and the peanuts soften within minutes of contact with the dressing. Store the shredded mango, chopped herbs, and dressing separately in the fridge for up to a day, then toss together at the table.
What if I can only find ripe mangoes at the store?
Ripe mango will not work as a direct substitute — it is too soft and sweet, and the salad loses its defining crunch and tartness. Green papaya is the closest swap that holds up structurally and delivers a similar sour bite. Failing that, green apple (Granny Smith) shredded into matchsticks is a widely used workaround that keeps the texture right.
Is this salad actually filling enough as a main dish?
On its own it is light, but adding a generous handful of peanuts and serving it over a bowl of cooked jasmine rice or rice vermicelli makes it a complete and satisfying meal. Sliced baked tofu on the side adds protein without any extra cooking time if you buy it pre-baked.
If you liked this one
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- Vegan Thai Drunken Noodles
- Sesame Ginger Soba Salad
- Vegan Pad Kra Pao