Fermented Tilapia Fish (Pla Som): A Delicious Thai Recipe

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.
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.
Prepare and Marinate the Tilapia

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.
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.
Ferment the Fish

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.
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.
Fry the Fermented Tilapia

Step 4. Serve Pla Som

  • Serve with chili, shallots, and lime for added flavor.
Serve with chili, shallots, and lime for added flavor.
Serve Pla Som

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!