Pla Som, or fermented tilapia, might sound unusual to some, but this pungent Thai delicacy is a beloved regional specialty with a rich history and surprisingly complex flavors. It's a testament to the ingenuity of Thai cuisine, transforming a humble fish into a powerful ingredient used in a variety of dishes. The strong aroma, initially off-putting to many newcomers, gives way to a captivating depth of taste – umami notes dance alongside a subtle sweetness and a lingering tang. This unique fermentation process, handed down through generations, results in a product both fascinating and delicious.
While the process might seem daunting at first glance, the rewards are well worth the effort. The resulting Pla Som is incredibly versatile, adding a distinct character to curries, salads, and even dips. Ready to embark on this culinary adventure? Let's dive into the step-by-step guide to making your own batch of authentic Thai Pla Som.
Tools Needed
- Mortar and pestle
- Plastic bag
- Rubber band
- Frying pan
- Wire rack
Ingredients
- Tilapia fish
- Salt
- Garlic
- Sticky rice
- Water
- Flour
- Egg
- Cooking oil
- Chili
- Shallots
- Lime
Step-by-Step Instructions
Step 1. Prepare and Marinate the Tilapia
- Prepare the fish by butchering and washing it thoroughly.
- Marinate the fish with salt, pounded garlic, and sticky rice. Add a little water and knead the mixture until well combined.
- Stuff the marinated sticky rice mixture into the fish's belly.



Step 2. Ferment the Fish
- Place the stuffed fish in a plastic bag, ensuring it's snugly fitted. Tie it tightly with a rubber band.
- Refrigerate the fermented fish for 4-5 days.


Step 3. Fry the Fermented Tilapia
- Coat the fermented fish with flour.
- Heat a pan with oil.
- Dip the floured fish in egg, then fry until golden brown and cooked through, flipping to ensure even cooking.
- Remove the fried fish and place it on a wire rack to drain excess oil.




Step 4. Serve Pla Som
- Serve with chili, shallots, and lime for added flavor.

Read more: Thai Beef Stew with Rice: A Melts-in-Your-Mouth Recipe
Tips
- Use a plastic bag that is the same size as the fish.
- For crispier frying, ensure the oil is hot before adding the fish.
Nutrition
- Calories: 200-300
- Fat: 10-15g
- Carbs: 20-30g
- Protein: 20-25g
FAQs
1. How long does it take to ferment Pla Som?
The fermentation process typically takes 7-10 days, depending on temperature and the specific recipe. You'll need to check regularly for signs of readiness.
2. What if my Pla Som smells too strong or off?
A strong, pungent aroma is expected. However, if it smells overly sour or rotten, it may have spoiled. Discard it if you have any doubts about its safety.
3. Can I use other types of fish instead of tilapia for Pla Som?
While tilapia is traditionally used, other firm, oily fish *might* work, but the flavor profile will likely differ. It's best to stick with tilapia for the most authentic result.
Making Pla Som is a rewarding experience that connects you to Thai culinary traditions. The unique flavor it brings to dishes is a testament to the power of fermentation, transforming a simple ingredient into something truly special. Enjoy the fruits of your labor – your homemade Pla Som is ready to elevate your next Thai meal!