Description
This Slow Cooker Tom Kha Soup is a comforting and aromatic Thai coconut chicken soup, featuring fragrant lemongrass, galangal, and kaffir lime leaves simmered slowly in a creamy coconut milk broth. It combines tender chicken, mushrooms, and a perfect balance of tangy lime, spicy chili, and savory fish sauce to create an authentic and flavorful dish that’s easy to prepare. Ideal for a cozy meal, this recipe uses a slow cooker to develop deep flavors with minimal hands-on time.
Ingredients
Scale
Base Aromatics
- ½ onion, sliced
- 2 cloves garlic, chopped
- ½ red jalapeño pepper, sliced (or 1-2 Thai chiles, halved)
- 3 slices galangal or ginger (about ¼-inch thick)
- 1 lemongrass stalk, pounded and cut into 2-inch pieces
- 10 kaffir lime leaves, torn (optional)
- 1 tbsp red Thai curry paste
Soup Liquid & Protein
- 4 cups chicken broth
- 2 cans (13.5 oz each) full-fat coconut milk or coconut cream
- 1 lb chicken breasts, cut into bite-sized pieces (or tofu or shrimp as alternatives)
Vegetables & Flavorings
- 8 oz white mushrooms, sliced
- 2-3 tbsp brown sugar or coconut sugar
- 2-3 tbsp fish sauce (or coconut aminos for a vegan option)
- 2-3 tbsp freshly squeezed lime juice
- Sliced green onions (for garnish)
- Chopped fresh cilantro (for garnish)
Instructions
- Combine aromatics: In the base of your slow cooker, add sliced onion, chopped garlic, sliced jalapeño, galangal (or ginger), lemongrass stalk pieces, torn kaffir lime leaves if using, and red Thai curry paste. This mixture will infuse the broth with rich, fragrant flavors.
- Add broth: Pour 4 cups of chicken broth over the aromatics in the slow cooker and stir well to combine all ingredients evenly.
- Slow cook aromatics: Cover the slow cooker and cook on high for 2-3 hours, or on low for 4-6 hours, allowing the flavors to meld and the broth to become deeply infused with the herbs and spices.
- Remove solids: After slow cooking, use a slotted spoon to carefully remove and discard the solids such as onion, garlic, lemongrass, galangal, and kaffir lime leaves to leave a clear, fragrant broth.
- Add coconut milk, protein, and mushrooms: Stir in the coconut milk along with the bite-sized chicken pieces (or tofu/shrimp alternative) and the sliced white mushrooms.
- Slow cook protein: Cover and cook on high for an additional hour or on low for 2 hours, until the chicken or chosen protein is fully cooked and tender.
- Season soup: Stir in the brown sugar, fish sauce, and freshly squeezed lime juice. Taste and adjust the seasoning to your preference by adding more sugar, fish sauce, or lime juice as needed.
- Serve and garnish: Ladle the soup into bowls and garnish with sliced green onions and chopped fresh cilantro. Serve the soup warm and enjoy the harmonious blend of Thai flavors.
Notes
- If you prefer a vegetarian or vegan version, substitute chicken broth with vegetable broth and use tofu or shrimp alternatives. Replace fish sauce with coconut aminos or soy sauce.
- Kaffir lime leaves are optional but add authentic citrus aroma—if unavailable, a small amount of lime zest can be used instead.
- Adjust the heat by adding more or fewer Thai chiles or jalapeños based on your spice tolerance.
- Use full-fat coconut milk or coconut cream for the richest soup texture; light coconut milk will be less creamy.
- The soup can be stored in the refrigerator for up to 3 days and reheated gently before serving.
