How to Make Thai Food Less Spicy: Simple Ways to Reduce Chili Heat

To make Thai food less spicy, control the chilies before they go in and dilute the heat afterward. Before cooking, use fewer or milder chilies, remove the seeds and pale inner ribs, and add less curry paste. After cooking, stir in more coconut milk or unseasoned ingredients such as vegetables, potato or tofu. Then rebalance the dish with a little palm sugar, lime juice or fish sauce. At the table, eat spicy bites with plain jasmine rice, cucumber or a creamy drink. Heat in a finished dish cannot be fully removed, but it can be spread out and softened until the dish is comfortable to eat.

Why Is Thai Food So Spicy?

Most of the heat in Thai food comes from capsaicin, the compound in chili peppers that triggers a burning sensation on the tongue and lips. Capsaicin does not dissolve well in water, but it does dissolve in fat and oil. That fact explains most of the fixes below. Coconut milk, peanuts and dairy help because they contain fat. A glass of plain water brings only brief relief.

Chili heat in Thai cooking comes in several forms. Knowing them helps you spot where the fire in a dish is coming from.

How to Recognize the Main Sources of Chili Heat

Bird's eye chilies (prik kee noo): tiny, slender chilies about the length of a fingertip. They are bright red or green, shiny and very hot for their size. They are often smashed into salads, stir-fries and dipping sauces.
Larger spur chilies: longer, finger-sized red or green chilies with thicker flesh. They are usually noticeably milder than bird's eye chilies and are often sliced for color.
Dried red chilies and chili flakes: dark red, wrinkled and papery, with a smoky, toasty smell. Thai restaurant tables often hold a small jar of roasted chili flakes for diners to add themselves.
Curry pastes: thick, damp pastes pounded from chilies, garlic, shallots, lemongrass, galangal and other aromatics. Green curry paste is pale to deep green and is often among the hottest. Red curry paste is brick red. Yellow and massaman pastes are golden to reddish-brown, warmly spiced and usually milder.
Chili jam (nam prik pao): a glossy, dark reddish-brown paste that tastes sweet, smoky and moderately hot. It appears in dishes such as tom yum soup.

The way a chili is handled matters as much as which chili it is. A whole chili simmered in a curry releases less heat than the same chili chopped finely or crushed in a mortar and pestle. Crushing breaks the chili open and spreads its capsaicin through the dish.

How to Reduce Heat in Thai Food Before and During Cooking

The easiest way to reduce heat in Thai food is to add less chili from the start. It is much easier to add heat later than to take it away. Follow these steps when cooking Thai dishes at home:

Pick milder chilies. Use larger spur chilies instead of bird's eye chilies. Use fewer of them, or leave fresh chilies out and offer chili flakes on the side.
Remove the seeds and inner ribs. Cut the chili lengthwise and scrape out the seeds and the pale, spongy membrane they cling to. The membrane holds much of the capsaicin. Wear gloves or wash your hands well afterward, and avoid touching your eyes.
Keep chilies whole or in large pieces. Bruise a chili lightly instead of chopping it. You can lift it out once the dish has enough warmth.
Use less curry paste. Start with about half the amount the recipe suggests, taste the sauce, and add more a little at a time. Keep in mind that this also reduces the aromatic flavors in the paste, such as lemongrass and galangal. A milder paste may taste a little less fragrant.
Choose a naturally milder dish. Massaman or yellow curry, chicken with cashew nuts and pad see ew (wide stir-fried noodles) are usually gentler than green curry, jungle curry or larb.
Taste as you go. Chili heat builds as a dish simmers and as you keep eating, so stop adding chili while it still seems slightly too mild.

How to Take the Heat Out of a Thai Curry That Is Too Spicy

To take the heat out of a Thai curry, dilute it and rebalance it. Add more coconut milk or unseasoned ingredients so the same amount of capsaicin is spread through more food. Then correct the seasoning so the curry still tastes like a curry, not a watered-down version of one.

Remove any visible chilies. Fish out whole or large chili pieces with a spoon before doing anything else.
Add coconut milk. Stir in coconut milk a few spoonfuls at a time and warm it gently. The extra fat holds onto capsaicin, and the creamy sweetness softens the burn. Full-fat coconut milk works better than light coconut milk.
Add unseasoned ingredients. Cooked potato, pumpkin, sweet potato, eggplant, bamboo shoots, tofu or extra unseasoned meat all absorb sauce and make each portion milder. Starchy vegetables like potato also thicken the sauce slightly.
Stretch with unsalted stock if needed. A splash of plain stock thins an overly thick, fiery sauce. Use it sparingly, because too much makes the curry taste flat.
Rebalance the flavor. Taste and add a pinch of palm sugar for sweetness, a few drops of fish sauce for saltiness, or a squeeze of lime if the dish suits sourness. Sweetness and saltiness do not remove chili heat, but they make it feel less dominant.
Combine with a no-chili batch. If the curry is far too hot, cook a small second batch with no chili or paste: coconut milk, aromatics, protein and vegetables. Mix it into the spicy curry until the heat level feels right.

Vigorous boiling can make coconut milk separate so that oil pools on the surface. Thai cooks sometimes do this on purpose when frying curry paste. When you are only adding coconut milk to calm a finished curry, a gentle simmer keeps the sauce smooth.

Methods for Reducing Chili Heat Compared

Method	How it works	Best for	Limitation
Adding coconut milk	Dilutes the sauce and adds fat that holds capsaicin	Red, green, yellow and panang curries; tom kha soup	Makes the dish richer and sweeter; can weaken other flavors
Adding unseasoned ingredients	Spreads the same heat over more food	Curries, stir-fries, soups	Needs extra cooking time; changes the texture of the dish
Adding stock or water	Thins the sauce	Thick curries and soups	Flavor becomes watery quickly; fat-free liquids do little to grip capsaicin
Palm sugar, fish sauce or lime	Balances the taste so the heat feels less dominant	Any dish after diluting	Does not remove heat; too much makes the dish too sweet, salty or sour
Dairy (cream or plain yogurt)	Fat and milk proteins help soften the burn	Emergency fix at home	Not traditional; changes the flavor; yogurt may curdle if boiled
Serving with rice and cucumber	Each bite contains less chili	Any spicy dish, at home or in a restaurant	Does not change the dish itself

Which Ingredients Help Tame Chili Heat in Thai Food?

The ingredients that tame chili heat best are those that add fat, sweetness, starch or plain bulk. Here is how to recognize each one and what it does in a dish.

Coconut Milk and Coconut Cream

Coconut milk is the white, creamy liquid made by pressing grated coconut flesh. In a can it often separates. A thick, almost solid layer of coconut cream sits on top and a thinner milky liquid lies below. It smells gently sweet and nutty. Coconut cream is richer and better at softening heat. Thin coconut milk dilutes more but adds less fat. Do not confuse either with coconut water, the clear liquid inside a young coconut. Coconut water has almost no fat and does little to calm chili heat.

Palm Sugar

Palm sugar is sold as golden-brown discs, soft cakes or a sticky paste. It smells of caramel and honey. Thai cooks shave or crush it into curries, dressings and stir-fries to round out salty and sour flavors. Light brown sugar is a workable substitute, though it has a sharper, more molasses-like taste and lacks palm sugar's mellow depth.

Fish Sauce and Lime

Fish sauce is a clear, amber-brown liquid with a strong salty, savory smell that mellows during cooking. Lime juice adds a bright, fresh sourness. Neither ingredient cools chili heat. Their job is to restore balance after you dilute a dish with coconut milk or vegetables, so the food tastes complete again. Add them in small amounts, because diluting and then over-seasoning can leave a dish too salty.

Rice, Cucumber and Peanuts

Jasmine rice: long, soft white grains with a floral, popcorn-like aroma. Eating curry over plenty of rice reduces the heat in each mouthful.
Sticky rice: short, opaque grains that cling together. In northeastern Thailand it is pressed into small balls by hand and eaten with fiery salads such as som tam and larb.
Cucumber: cool, crisp and watery. It is often served sliced alongside spicy dishes or in a sweet-sour cucumber relish with satay.
Roasted peanuts: crunchy, golden and rich in fat. They add a gentle buffer in dishes such as panang curry and som tam.

Dairy Substitutes and Their Limits

If you have no coconut milk, a spoonful of cream or plain yogurt can soften an overly spicy dish. Dairy contains fat and milk proteins that help ease the burning feeling. However, dairy is not a traditional Thai ingredient. It shifts the flavor away from the coconut sweetness of a Thai curry, and yogurt can split into grainy curds if it boils. Stir it in off the heat, or serve it as a cooling spoonful on the side.

How to Make Thai Food Less Spicy at a Restaurant

At a Thai restaurant, the simplest way to get less spicy food is to ask for it when you order. Many Thai dishes are cooked to order, so the cook can usually use fewer chilies. Useful Thai phrases include mai phet (not spicy) and phet nit noi (a little spicy). Asking for chili flakes or sliced chilies in fish sauce on the side lets you add heat yourself.

Some dishes are harder to adjust. A curry made in a large batch, or a curry paste that already contains chilies, will always carry some heat. In those cases, choose milder dishes or plan to eat the curry with extra rice. For som tam (green papaya salad), the chilies are pounded with the dressing in a mortar for each order, so asking for one chili instead of several makes a real difference.

How to Cool Your Mouth After Eating Something Too Spicy

To cool your mouth after a spicy Thai bite, eat something fatty, starchy or creamy rather than gulping water. Plain rice, sticky rice, cucumber, a sip of coconut milk or a creamy drink such as Thai iced tea made with sweetened milk all help. Cold water brings brief relief, but because capsaicin does not dissolve well in water, the burn often returns as soon as you swallow. Pausing for a minute between bites also helps, because chili heat fades on its own over time.

Common Mistakes When Reducing Heat in Thai Food

Adding only water: the heat drops slightly, but the curry turns thin and bland.
Adding lots of sugar: sweetness masks heat, but too much makes a savory curry taste like dessert.
Cutting curry paste without making up for flavor: less paste means less lemongrass, galangal and garlic as well. Adding a few aromatics such as sliced lemongrass, garlic or kaffir lime leaves helps keep the flavor full.
Forgetting that heat builds: a dish that seems mild in the first spoonful can feel much hotter by the end of the meal, so season cautiously.

Once you know where chili heat comes from and which ingredients soften it, you can adjust almost any Thai dish to your taste. That way you still enjoy the fragrant, creamy and tangy flavors that make the food so memorable, without the burn taking over.