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This slow cooker version of my best-ever tom kha soup recipe (or Thai coconut chicken soup) is absolutely perfect… and made to be easier than ever! Light, yet filling and full of tangy flavor, it’s the best tom kha gai recipe I’ve ever made or tried and is so creamy, easy, and delicious.

Slow cooker tom kha soup in a bowl surrounded by lime wedges

What Makes This Soup So Good

  • This recipe is based on my Best Ever Tom Kha Gai Soup, which is one of my most popular recipes for a reason. It’s creamy, yet light, tangy, yet sweet. It’s the perfect soup when it’s getting cooler outside (or just downright cold), or when you’re craving spicy Thai goodness. And it’s soooo good.
  • Slow cooker Tom Kha Gai is full of delicious ingredients. And sure, I’ll admit, this soup was already easy… but the slow cooker makes it even easier! I really love slow cooker recipes. Just toss everything in and come back in a few hours to a delicious meal!
  • This recipe can fit a variety of dietary needs! We’ve included specific dietary variations below, but you can adapt this slow cooker Tom Kha Gai to be Whole30-compliant, paleo, vegan, or vegetarian. You could also sub in shrimp for the chicken if you don’t eat poultry!

Key Ingredients

Red Thai Curry Paste – Made from red chilis, this paste is a little sweet, spicy, and savory and adds a major punch of flavor to your Crockpot tom kha gai.

Lime Leaves – Kaffir lime leaves are traditional to Thai cooking and add a delicious citrus and floral aroma.

Galangal or Ginger – Galangal is citrusy, while ginger is sharp and spicy. If you can’t find galangal, ginger will work just fine.

Lemongrass – Citrusy and tangy, lemongrass gives the slow cooker tom kha gai a lemony, minty flavor.

Coconut Milk or Cream – Rich, sweet, and creamy, coconut milk or cream makes this tom kha light, filling, and full of flavor.

Dietary Variations

  • If you’re vegan or on Whole30, sub the chicken broth with 2 more cans of full-fat coconut cream or coconut milk.
  • For vegan or vegetarian slow cooker tom kha, sub out the chicken with tofu. Use a 1-pound block of firm or extra firm (can be regular or silken) tofu cut into cubes. Use soy sauce to taste instead of using fish sauce.
  • If you’re on Whole30, use 2 tablespoons of coconut aminos instead of coconut sugar. You’ll also want to make sure you use fish sauce that doesn’t have sugar. The only one I know of is Red Boat Fish Sauce.
  • You can also use shrimp instead of chicken. Add 1 pound of raw shrimp instead of the chicken and heat until it’s cooked through (it’ll be pink and no longer translucent).

Chef’s Tips

  • Be sure to use coconut cream or coconut milk. Coco lopez and coconut creamer are not the same as coconut cream/coconut milk and will not work in this recipe.
  • Refrigerate any leftover slow cooker tom kha gai in an airtight container. It’ll keep up to a week (it usually disappears way faster than that at my house, though!).
  • While the lime leaves are optional, I hiiiiighly recommend using them if you can! They add a ton of this incredible lime flavor to tom kha that’s slightly different than the flavor you get from lime juice alone. Just make sure not to actually serve the leaves – they’re tough and not pleasant to eat.
Close-up of tom kha soup in a bowl

More Delicious Asian-Inspired Recipes to Try

Recipe By: Cheryl Malik
4.98 from 34 votes

Slow Cooker Tom Kha Soup (Thai Coconut Chicken Soup)

Prep 10 minutes
Cook 8 hours
Total 8 hours 10 minutes
This slow cooker version of my best-ever tom kha soup recipe (or Thai coconut chicken soup) is absolutely perfect… and made to be easier than ever! Light, yet filling and full of tangy flavor, it's the best tom kha gai recipe I've ever made or tried and is so creamy, easy, and delicious.
6 servings

Equipment

  • Crockpot or similar slow cooker
  • Slotted spoon

Ingredients

  • half of one onion sliced
  • 2 cloves garlic chopped
  • half of one red jalapeño pepper sliced; or a couple Thai chiles, halved
  • 3 quarter-inch-long slices galangal or ginger
  • 1 lemongrass stalk pounded with the side of a knife, cut into 2-inch-long pieces
  • 10 lime leaves torn, optional
  • 1 tablespoon red Thai curry paste
  • 4 cups chicken broth see Notes
  • 2 13.5-ounce cans full-fat coconut milk or coconut cream
  • 2 small chicken breasts approximately 1 pound, cut into bite-sized pieces; see Notes for alternatives
  • 8 ounces white mushroom caps sliced
  • 2-3 tablespoons brown sugar or coconut sugar, see Notes
  • 2-3 tablespoons fish sauce plus more to taste
  • 2-3 tablespoons freshly squeezed lime juice
  • 2-3 green onions thinly sliced
  • chopped fresh cilantro for garnish

Instructions

  • Add onion, garlic, jalapeño or chile, galangal or ginger, lemongrass, lime leaves, red curry paste, and chicken broth to slow cooker. Stir to incorporate, then cover slow cooker with lid.
  • Cook on high heat for 2 to 3 hours, or low heat for 4 to 6 hours. After cook time is up, use slotted spoon to remove all aromatics, leaving broth behind.
  • Add in coconut cream or milk, chicken breast (or tofu or shrimp), and mushrooms. Cook on high heat 1 hour or low heat 2 hours, or until chicken breast pieces are cooked through.
  • After cooking, add sugar, fish sauce, and lime juice. Taste and add more of each ingredient as desired. Ladle soup into serving bowls and top with sliced green onions and fresh cilantro. Serve warm.
  • Shrimp Variation: Use 1 pound of raw shrimp instead of the chicken. Cook until shrimp is pink, slightly curled, and no longer translucent.
  • Make it Vegan/Vegetarian: Use vegetable broth or a vegan chicken broth. Sub chicken with a 1-pound block of firm or extra firm (can be regular or silken) tofu cut into cubes. Use soy sauce to taste instead of fish sauce, or use a vegan fish sauce.
  • Make it Whole30: Use compliant chicken broth. Replace brown or coconut sugar with 2 tablespoons coconut aminos and use a compliant fish sauce without sugar (the only one I know of is Red Boat Fish Sauce).

Approximate Information for One Serving

Serving Size: 1servingCalories: 391calProtein: 22gFat: 30gSaturated Fat: 25gTrans Fat: 0.01gCholesterol: 52mgSodium: 1162mgPotassium: 805mgTotal Carbs: 14gFiber: 1gSugar: 7gNet Carbs: 13gVitamin A: 485IUVitamin C: 11mgCalcium: 55mgIron: 5mg
Nutrition Disclaimers
Number of total servings shown is approximate. Actual number of servings will depend on your preferred portion sizes.
Nutritional values shown are general guidelines and reflect information for 1 serving using the ingredients listed, not including any optional ingredients. Actual macros may vary slightly depending on specific brands and types of ingredients used.
To determine the weight of one serving, prepare the recipe as instructed. Weigh the finished recipe, then divide the weight of the finished recipe (not including the weight of the container the food is in) by the desired number of servings. Result will be the weight of one serving.

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102 Comments

  1. I LOVE this recipe!! When I lived in Encinitas, CA there was a Thai Restaurant with awesome Tom Kha Soup. People traveled miles to join me for a Thai meal. Then I moved to Vancouver, Canada and haven’t found any as good 🙁 Now, I’ll make it here and invite friends, Thank you for posting this recipe!5 stars

    1. We usually get ours from a local International farmer’s market, but you can find lemongrass at most grocery stores now!

  2. If I were to add some cut up tomatoes to this recipe–a variation I’ve had in shine Thai restaurants that I really enjoy–when would I add them? Can’t wait to try this!

    1. Hi, Cheri! You could add them at step 2, with the mushrooms. That sounds delicious- be sure to let us know how it turns out! 😊

  3. My family loved this soup, I only put 2 tbls of fish sauce, I added an additional tsp of red curry chili paste and a dried chili pepper from my garden with the aromatics . I made rice noodles on the side and we spooned the soup over the noodles to make it heartier. This soup is worth the time it takes to make it. I also didn’t use a crock pot since I don’t own one, stove top it was and it was no problem.5 stars

    1. Yumm, rice noodles sound like a delicious addition! Thanks so much for sharing these helpful tips, and we’re so glad you enjoyed it!

  4. If you can not digest onion and garlic is it ok to leave them out entirely or is there something to replace those with?

    1. You can definitely omit the onion and garlic! You could add more galangal, lime, or red curry paste if you taste it towards the end and feel the need for some extra flavor!

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