Last updated: April 2026 By Tyler Abbott, food writer and home cook

Thai peppers — specifically the bird’s eye chili, or prik kee noo — measure 50,000 to 100,000 Scoville Heat Units. That’s roughly 15 times hotter than a jalapeño. And Thai cooks don’t use them sparingly. They pound them into curry pastes, toss them whole into stir-fries, and slice them raw into salads. If you want to cook Thai food that actually tastes like Thailand, you need to understand how these peppers work in a dish, not just how hot they are.

Here’s what you’ll learn in this guide:

• The 9 dishes where Thai peppers do the most work, from mild-friendly to genuinely painful
• Which type of Thai chili goes in which dish (they’re not interchangeable)
• How to dial the heat up or down without wrecking the flavor balance
• Substitutes that won’t make a Thai cook wince

The peppers you need to know first

Thailand has roughly 79 recognized chili varieties across three pepper species. But you’ll encounter a handful over and over in recipes, and mixing them up will either leave your dish flat or send someone to the milk carton.

Prik kee noo (bird’s eye chili) is the default “Thai pepper” — small, thin, and extremely hot at 50,000–100,000 SHU. Green ones taste sharper and grassier. Red ones are sweeter with rounder heat. Most of the dishes below use this pepper.

Prik chee fah is the milder, longer chili (5,000–30,000 SHU) that shows up in curries and stir-fries where you want color and moderate warmth without blowing out your palate. Its name translates to “sky-pointing chili” because of how it grows upward on the plant.

Prik yuak is a sweet, mild green pepper with essentially zero heat. It’s the one used in stuffed pepper dishes and as a pickled condiment for noodle soups.

Prik jinda sits around 75,000 SHU — hot, but slightly less aggressive than bird’s eye. You’ll see it in dipping sauces and as a table condiment.

Now the dishes.

1. Pad kra pao (Thai basil stir-fry)

This is Thailand’s version of fast food — cheap, fast, and everywhere. A street vendor can have it on a plate in under two minutes. The dish dates back to Prime Minister Plaek Phibunsongkhram’s cultural mandates during WWII, when the government promoted specific dishes in local cooking contests. It stuck.

The prik kee noo goes into the wok with garlic right at the start, seared in screaming-hot oil until fragrant. Then ground pork or chicken, oyster sauce, soy sauce, fish sauce, sugar, and a handful of holy basil thrown in at the last second so it wilts but doesn’t go limp.

Served over rice with a fried egg on top. The egg yolk cuts the heat. Order it “pet mak” (very spicy) and you’ll get a fistful of peppers. Order it “pet nit noi” (a little spicy) and you’ll get two or three.

Heat level: Adjustable, but traditionally medium-high. Start with 3–5 bird’s eye chilies per serving.

2. Som tum (green papaya salad)

This is where Thai peppers go to war. The Northeastern Thai (Isaan) version of som tum pounds fresh bird’s eye chilies with garlic in a clay mortar before adding shredded green papaya, tomatoes, long beans, dried shrimp, peanuts, fish sauce, palm sugar, and lime juice. The pounding releases maximum capsaicin — much more than slicing would.

I’ve watched Thai vendors casually toss 10–15 chilies into a single serving. Most foreigners tap out at three.

The sourness of the lime and the sweetness of the palm sugar are supposed to balance the heat. They help. But if you’ve had the real Isaan version, “balance” is a generous word.

Heat level: Extreme if made traditionally. Specify the number of chilies when you order.

3. Tom yum goong (spicy shrimp soup)

Tom yum is one of the most recognized Thai dishes worldwide, and for good reason. The broth is built on aromatics — lemongrass, galangal, kaffir lime leaves — then hit with bird’s eye chilies and nam prik pao (roasted chili paste) for heat. Fresh shrimp go in last and cook in the hot broth for barely a minute.

The chili paste contributes a smoky, slightly sweet layer underneath the fresh chili’s sharper bite. That dual-pepper approach is something you see across Thai cooking: a slow-burning base from paste, topped with a brighter, more immediate heat from fresh peppers.

Heat level: Medium to high. The broth distributes the capsaicin, so every spoonful carries heat.

4. Gaeng khiao wan (Thai green curry)

Green curry gets its color and its fire from fresh green bird’s eye chilies pounded into a paste with galangal, lemongrass, kaffir lime leaves, shallots, garlic, cilantro root, cumin, and shrimp paste. Making the paste from scratch with a mortar and pestle produces a noticeably better flavor than store-bought — the pounding releases oils differently than a blender does.

The paste gets fried in the thick cream that rises to the top of a coconut milk can until the oil separates (this step is called “cracking” the coconut cream, and skipping it is the most common mistake home cooks make). Then thin coconut milk, protein, Thai eggplant, and more basil.

Heat level: Medium. The coconut milk tempers the chili significantly.

5. Larb gai (spicy chicken salad)

Larb is a cold salad from Isaan and Laos — ground chicken (or pork, or duck) cooked just until done, then dressed with lime juice, fish sauce, toasted rice powder, shallots, mint, cilantro, and sliced bird’s eye chilies.

The toasted rice powder is what makes larb taste like larb. Without it, you’ve just got spicy ground meat with herbs. Toast raw sticky rice in a dry pan until golden, then grind it. It adds a nutty, slightly sandy texture that absorbs the dressing.

Fresh chilies go in raw here, so the heat is immediate and direct. No cooking to mellow them out.

Heat level: High. The raw chilies don’t soften or mellow.

6. Massaman curry

The outlier on this list. Massaman originated in southern Thailand near the Malaysian border and uses whole spices — cardamom, cinnamon, cloves, star anise — more common in Indian and Malay cooking than Thai. The curry paste includes dried red chilies (usually the milder prik chee fah), not bird’s eye.

The result is a thick, mild-to-medium curry with potatoes and peanuts. It’s the entry point for people who want Thai curry flavor without the full burn. That said, “mild by Thai standards” can still surprise you.

Heat level: Mild to medium. The mildest curry on most Thai menus.

7. Khao soi (Chiang Mai noodles)

A northern Thai dish built on a coconut-based red curry broth, served over egg noodles and topped with crispy fried noodles. The curry paste uses dried red chilies and shrimp paste as its heat base.

Khao soi typically comes with pickled mustard greens, shallots, and lime on the side. It’s rich, complex, and moderately spicy. You can doctor the heat at the table with the chili oil and pickled chilies that usually accompany it.

Heat level: Medium. The coconut broth rounds things off.

8. Nam prik (Thai chili dipping sauces)

Nam prik isn’t one dish — it’s a whole category of pounded chili pastes and dipping sauces. Every region of Thailand has its own versions. The common thread: chilies, garlic, shrimp paste, fish sauce, and lime juice, all pounded in a mortar.

Nam prik num uses roasted green chilies and is relatively mild. Nam prik ong uses tomatoes and ground pork. Nam prik pao is the roasted chili paste that goes into tom yum. Each has a different heat profile and a different job at the table.

These sauces are meant to be eaten with raw vegetables, sticky rice, or fried foods. They’re condiments, not main dishes, but they’ll contribute more heat per bite than most of the curries above.

Heat level: Varies wildly — mild to extreme depending on the variety.

9. Yum woon sen (glass noodle salad)

A cold salad made with mung bean glass noodles, ground chicken or shrimp, garlic, tomatoes, fresh herbs, and sliced bird’s eye chilies. The noodles absorb the dressing — lime juice, fish sauce, sugar, chili — so every bite carries the full flavor.

The dish comes together in about 15 minutes and works well as a weeknight dinner. The glass noodles need a brief soak in hot water, not boiling, and overcooking them turns the texture gummy.

Heat level: Medium-high. Adjustable by how many chilies you use.

How to handle the heat (and how to dial it back)

A few things I’ve learned from cooking with Thai peppers regularly:

Removing seeds helps, but not as much as people think. Most of the capsaicin is in the white membrane (placenta) inside the pepper, not the seeds. Scraping out the membrane with a knife does more than just shaking the seeds loose.

Dairy works, water doesn’t. Capsaicin is oil-soluble, not water-soluble. Drinking water just spreads it around your mouth. Full-fat milk, yogurt, or even a spoonful of coconut cream will actually neutralize the burn.

Green and red bird’s eye chilies aren’t interchangeable. Green ones are grassier and more sharply hot. Red ones are sweeter and rounder. Thai recipes usually specify which one to use for a reason.

Start low. Use 1 Thai pepper where a recipe calls for 1 jalapeño. For authentic heat levels, scale up to 3–5 per serving and adjust from there.

Wear gloves. This sounds paranoid until you rub your eye two hours after chopping prik kee noo. The oils linger on skin. If you skip gloves and get burned, apply full-fat dairy to the skin for five minutes before washing with soap.

Substitutes in a pinch

Serrano peppers (10,000–25,000 SHU) are the closest common substitute — similar shape, similar grassy flavor, about a quarter of the heat. Use two serranos for every one Thai pepper.

Cayenne peppers (30,000–50,000 SHU) match the heat better but have a different flavor — less fruity, more one-dimensional. Fine for curries, less ideal for salads where the raw pepper flavor matters.

Jalapeños (2,500–8,000 SHU) are too mild to be a real substitute. You’d need 5–10 of them to match a single Thai pepper, and the flavor still won’t be right.

Frequently asked questions

How hot are Thai peppers compared to jalapeños? Thai bird’s eye chilies (prik kee noo) measure 50,000–100,000 SHU on the Scoville scale. A typical jalapeño measures 2,500–8,000 SHU. That makes Thai peppers roughly 15 times hotter.

Can I grow Thai peppers at home? Yes. They do well in warm climates or containers with at least six hours of direct sunlight per day. From seed to harvest takes about 130 days. Water regularly but don’t overwater — root rot is the most common killer.

What’s the difference between green and red Thai peppers? Both are the same pepper at different stages of ripeness. Green peppers are picked earlier and taste sharper with a grassy bite. Red peppers are fully ripe, sweeter, and produce a rounder heat. Most Thai cooks use green in salads and clear soups, and red in curries and dipping sauces.

Are Thai peppers and bird’s eye chilies the same thing? Bird’s eye chili (prik kee noo) is the most common Thai pepper variety, but Thailand has roughly 79 recognized chili varieties. When a recipe calls for “Thai pepper” without specifying, it almost always means the bird’s eye chili.