Dinner · Part 1 of 3: Ingredients
Spicy Thai Tom Yum Seafood Boil for a Quick Dinner

- Prep
- Cook
- Total
- Serves
- 4
Discover the art of slow-cooked Thai flavors with this simple Tom Yum seafood boil. This recipe transforms humble ingredients into a restaurant-worthy feast using your slow cooker, capturing the essence of a vibrant night market in every spoonful of spicy, aromatic broth.
The Tom Yum seafood boil is a classic Thai-inspired dish that relies on the harmony of lemongrass, galangal, and kaffir lime leaves. By using a slow cooker, the aromatic profile of the broth develops deeply over time, coating the tiger prawns and mussels in a rich, tangy, and spicy liquid.
It is a perfect dish for entertaining or a cozy night in, offering an impressive presentation with minimal effort required from the cook.
Ingredients
Seafood
- 2 lb tiger prawns, head-on
- 1 lb green-lipped mussels
Aromatics
- 2 stalks lemongrass, sliced
- 3 slices fresh galangal
- 5 leaves kaffir lime leaves
- 4 Thai chilies, whole
Base
- 4 tbsp Tom Yum paste
Finish
- 1/2 cup evaporated milk
- 2 tbsp fresh lime juice
Garnish
- 1/4 cup fresh cilantro, chopped
- 2 Thai bird's eye chilies, sliced
Why this recipe works
The slow cooker method provides a gentle, consistent heat that is ideal for seafood. By cooking the prawns and mussels in a concentrated aromatic base, they absorb the complex flavors of the Tom Yum paste without becoming rubbery.
This technique ensures the seafood remains tender and succulent while the broth becomes infused with the bright, citrusy notes of the herbs.
Layering the ingredients allows the aromatics to steep effectively into the broth. When the paste and herbs are placed with the seafood from the beginning, the flavors meld into a cohesive, balanced sauce.
Finishing the dish with evaporated milk and fresh lime juice at the end creates a silky, tangy finish that prevents the dairy from curdling during the long cooking process.
Notes and substitutions
When selecting tiger prawns, look for firm shells and a fresh, clean scent. If using frozen prawns, ensure they are fully thawed and patted dry before adding them to the slow cooker to avoid excess water diluting the broth. The head-on variety adds significant depth and richness to the Tom Yum base, providing a more authentic flavor profile for this style of boil.
Tom Yum paste is the backbone of this recipe, providing the necessary heat and spice. It is widely available in the international aisle of most supermarkets.
Ensure the paste is free from added preservatives or excessive sugar if you prefer a cleaner flavor. For the aromatics, fresh lemongrass and galangal are essential for the traditional, bright, and woody taste that defines this classic Thai soup base.
- Galangal: Fresh ginger is a common and accessible alternative, though it lacks the specific piney, citrusy depth of galangal.
- Kaffir lime leaves: Use the zest of a regular lime if kaffir lime leaves are unavailable, though the aroma will be slightly different.
Equipment
- Slow cooker
- Ladle
- Knife
- Cutting board
Up next · Part 2 of 3
3 steps · 2 h of cooking · what to look for at each stage
Step-by-step instructions (Part 2)