Slow Cooker Tom Kha Soup – Creamy Thai Coconut Chicken

It is 6 p.m., everyone is hungry, and you do not want to stand at the stove. That is exactly when this slow cooker tom kha soup earns its spot. You drop chicken, coconut milk, and aromatics into the pot in the morning, and dinner is waiting when you walk back in.

Tom kha is the Thai coconut soup that tastes fancy but is built on simple parts: coconut milk, chicken broth, lemongrass, galangal, lime leaves, and lime juice. The slow cooker softens the chicken until it shreds with a spoon and lets the lemongrass and lime perfume the whole broth without any babysitting.

Here is a worked example so you can plan: if you start the cooker at 9 a.m. on low, it is done by 4 p.m., which gives you a full hour of buffer before dinner. Add the lime juice and fish sauce at the very end, because heat mutes their brightness. That one small timing habit is what makes it taste fresh instead of flat.

About the Ingredients

1 1/2 pounds (680g) boneless, skinless chicken thighs

Thighs stay juicy through a long cook, unlike breast meat which can dry out. If you only have chicken breasts, add them in the last 2 hours on low so they do not overcook.

2 cans (13.5 oz / 400ml each) full-fat coconut milk

Full-fat gives the creamy body tom kha is known for; light coconut milk tastes watery here. Shake each can well before opening, and if the cream has separated, whisk it smooth.

3 cups (720ml) low-sodium chicken broth

Low-sodium lets you control the salt level, since fish sauce adds plenty later. Vegetable broth works fine if you want a lighter, meat-free base.

8 oz (225g) cremini mushrooms, sliced

Creminis hold their shape better than white buttons in a slow cooker. Oyster mushrooms are a great swap and give a silkier bite.

1 stalk lemongrass, bruised and cut into 3-inch pieces

Bruise it with the back of a knife so the oils release. If you cannot find fresh lemongrass, use 2 tablespoons of lemongrass paste and stir it in at the end.

4 slices fresh galangal (or 1 tablespoon ginger)

Galangal is piney and peppery; ginger is sharper but a fine stand-in. Leave slices whole so you can fish them out before serving.

6 fresh or frozen makrut lime leaves, torn

Tearing the leaves releases their citrus perfume. If unavailable, use the zest of 1 lime added at the end instead.

2 tablespoons fish sauce, plus more to taste

Fish sauce is the salty backbone of the soup. For a vegetarian version, use soy sauce or coconut aminos and taste before adding more.

1 tablespoon light brown sugar

A little sugar balances the sour lime and salty fish sauce. Honey or palm sugar works one-for-one.

3 tablespoons fresh lime juice (about 2 limes)

Add this off the heat, because cooking dulls the fresh flavor. Bottled lime juice is a last resort; fresh is noticeably brighter.

1/4 cup chopped fresh cilantro, plus lime wedges to serve

Stir cilantro in at the end so it stays green. Thai basil is a lovely swap if you have it.

Tips & Tricks

• Do not boil the coconut milk. Keep the cooker on low after the coconut milk goes in, because a hard boil can make it look grainy and split.
• Fish out the aromatics. Lemongrass, galangal, and lime leaves are for flavor, not eating; remove them before serving so nobody gets a woody bite.
• Season at the end. Fish sauce and lime juice go in after the heat is off, so the soup tastes bright rather than cooked-down.

Step-by-Step Instructions

1. Load the slow cooker

Add the chicken thighs, chicken broth, mushrooms, lemongrass, galangal, and torn lime leaves to a 6-quart slow cooker. Pour in the coconut milk and stir gently to combine.

2. Cook low and slow

Cover and cook on low for 5 to 6 hours or on high for 3 to 4 hours. The soup is ready when the chicken shreds easily with a fork and reaches 165F (74C) at the thickest part, with gentle bubbling at the edges.

3. Shred the chicken

Lift the chicken out with tongs and shred it with two forks, then return it to the pot. It should fall apart with almost no resistance.

4. Remove the aromatics

Fish out the lemongrass pieces, galangal slices, and lime leaves with a slotted spoon and discard them. This keeps each spoonful smooth and easy to eat.

5. Season off the heat

Turn the cooker off and stir in the fish sauce, brown sugar, and fresh lime juice. Taste and add more fish sauce a teaspoon at a time until the broth tastes savory and bright.

6. Finish and serve

Ladle into bowls and top with cilantro and a lime wedge. Serve hot with jasmine rice on the side if you like.

Delicious Variations

Shrimp Tom Kha

Swap the chicken for 1 pound of shrimp added in the last 15 minutes on low, until pink and curled.

Vegetable Tom Kha

Use vegetable broth, skip the chicken, and add 2 cups of sliced bell pepper and snap peas in the last 30 minutes.

Extra-Spicy Tom Kha

Add 2 sliced Thai chilies and a teaspoon of chili crisp at the end for a slow, warm burn.

How to Store Slow Cooker Tom Kha Soup (Thai Coconut Chicken Soup)

Frequently Asked Questions

Try it this week: load the slow cooker before you leave for work, then finish it with lime and fish sauce right before dinner. Small steps still count.

Slow Cooker Tom Kha Soup (Thai Coconut Chicken Soup)

Slow Cooker Tom Kha Soup is creamy Thai coconut chicken soup made hands-off, with tender chicken, mushrooms, and a bright lemongrass-lime broth.

★★★★½ 4.8 (213 ratings)

15 minPrep time35 minCook time6Servings285 kcalCalories

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🧂 Ingredients

• 1 1/2 pounds (680g) boneless, skinless chicken thighs
• 2 cans (13.5 oz / 400ml each) full-fat coconut milk
• 3 cups (720ml) low-sodium chicken broth
• 8 oz (225g) cremini mushrooms, sliced
• 1 stalk lemongrass, bruised and cut into 3-inch pieces
• 4 slices fresh galangal (or 1 tablespoon ginger)
• 6 fresh or frozen makrut lime leaves, torn
• 2 tablespoons fish sauce, plus more to taste
• 1 tablespoon light brown sugar
• 3 tablespoons fresh lime juice (about 2 limes)
• 1/4 cup chopped fresh cilantro, plus lime wedges to serve

📋 Instructions

1. 1Load the slow cooker — Add the chicken thighs, chicken broth, mushrooms, lemongrass, galangal, and torn lime leaves to a 6-quart slow cooker. Pour in the coconut milk and stir gently to combine.
2. 2Cook low and slow — Cover and cook on low for 5 to 6 hours or on high for 3 to 4 hours. The soup is ready when the chicken shreds easily with a fork and reaches 165F (74C) at the thickest part, with gentle bubbling at the edges.
3. 3Shred the chicken — Lift the chicken out with tongs and shred it with two forks, then return it to the pot. It should fall apart with almost no resistance.
4. 4Remove the aromatics — Fish out the lemongrass pieces, galangal slices, and lime leaves with a slotted spoon and discard them. This keeps each spoonful smooth and easy to eat.
5. 5Season off the heat — Turn the cooker off and stir in the fish sauce, brown sugar, and fresh lime juice. Taste and add more fish sauce a teaspoon at a time until the broth tastes savory and bright.
6. 6Finish and serve — Ladle into bowls and top with cilantro and a lime wedge. Serve hot with jasmine rice on the side if you like.

👨‍🍳 Chef's Note: Taste before you salt. Fish sauce is salty and concentrated, so add it in small amounts at the end rather than seasoning the pot early.

Servings: 6

Cuisine: Thai

Course: Soup

Nutrition (per serving): 285 kcal · 22g protein · 12g carbs · 18g fat