Ingredient Notes, Cook’s Tips, and FAQs
- For the Thai fresh ingredients: If you are in Asia, you can usually find Asian red shallots, Bird’s Eye red chilies, galangal, kaffir lime leaves, and lemongrass in the Thai stall of your local wet market. If you’re based in the U.S. or elsewhere, try finding these ingredients at your local Thai or Asian groceries store. For galangal, add an additional tablespoon of chopped ginger if unable to locate. In place of the Bird’s Eye red chilies, you could use large dried red chilies instead – they are traditionally used to make Thai curry pastes.
- Let the soup gently simmer and avoid letting it come to a boil. You don’t want it to come to a boil as the coconut milk may curdle. It’ll taste fine if it does curdle, but the soup will have white flaky bits in it which is not ideal. Aim for a slow, gentle simmer to avoid curdling.
- Use lemon juice to help clean your food processor bowl. The turmeric powder may leave yellow stains in your food processor bowl. To get rid of the stains, add 2-3 tablespoons of freshly squeezed lemon juice to the bowl and let it sit near a window where ample sunlight is coming through for a few hours. Then rinse with soap and water as you normally would and voila! No more yellow stains.
- Use store-bought Thai red curry paste. If you prefer not to make the Khao Soi paste or can’t find all the ingredients easily to make it, you can use a store-bought red curry paste instead. You’ll need 100-113 grams (3.5-4 ounces) give or take, depending on how spicy you want the soup to be. Note that it won’t taste exactly the same as my Khao Soi Gai, but it’ll still be pretty darn tasty!
- Is Khao Soi Gai spicy? My version leans on the spicier side. But if you prefer to make this milder, reduce the amount of fresh and dried red chilies you use for the Khao Soi paste. Or you could use half of the Khao Soi paste to make the soup and freeze the rest in a freezer-friendly container for another day. Also, reduce (or omit entirely) the amount of fresh red chilies, chili powder, and crushed red pepper chili flakes you use for the soup.
- Can I make this gluten-free? To make this gluten-free, replace the sweet dark soy sauce with a gluten-free sweet dark soy sauce such as a gluten-free kecap manis and double check that your fish sauce is GF certified. Also, serve with thin rice or buckwheat noodles instead of egg noodles. In place of the crispy wonton wrapper strips, coat some of the boiled rice/buckwheat noodles in corn starch and then deep-fry them in batches until golden brown instead.
- Can I make this vegetarian/vegan? Use a vegan fish sauce and veggie broth, omit the chicken, and use rice noodles such as vermicelli. Top off your bowl of soup noodles with baked or crispy pan-fried tofu cubes instead.
- Can I make the Khao Soi paste in advance? You can make the paste up to 1 day in advance. Store in a sealed airtight container in the refrigerator. Then take it out of the fridge the next day when you’re ready to start preparing the other ingredients for the soup. I wouldn’t make it any sooner than a day in advance because the water in may cause it to go bad.
- Can I use bone-in chicken drumsticks or thighs? Yes. In fact, it’s traditionally made with drumsticks in Chiang Mai. However, I prefer to use boneless and skinless chicken thighs because it’s less messy to eat than drumsticks in this noodle soup.
- Can I make this ahead? You can make the soup 3-4 days in advance. Store in individually portioned sealed airtight containers in the refrigerator. But cook the egg noodles, fry the crispy wonton wrapper strips, and prepare the other optional toppings when ready to serve.
- Is this freezer-friendly? The Khao Soi paste is, but I don’t recommend freezing the soup. The paste will stay good for up to two months in a freezer-friendly sealed airtight container. However, the coconut milk might separate if you try to freeze the soup. It is best eaten fresh.