Print

Chilean Sea Bass with Beurre Blanc Sauce Recipe

4.8 from 86 reviews

This Chilean Sea Bass recipe offers a quick and elegant dinner option, featuring tender baked sea bass fillets complemented by a rich and velvety beurre blanc sauce. Ready in just 20 minutes, this dish balances the delicate flavor of sea bass with a tangy lemon and white wine butter sauce, making it perfect for a special occasion or an easy gourmet meal.

Ingredients

Scale

Sea Bass Fillets

  • 4 (5-oz) Chilean sea bass fillets (or other sea bass variety)
  • 3 tbsp Olive oil
  • 1/2 tbsp Lemon juice
  • 1/2 tsp Garlic powder
  • 3/4 tsp Sea salt
  • 1/4 tsp Black pepper

Beurre Blanc Sauce

  • 1/2 medium Shallot (minced)
  • 1/3 cup White wine
  • 1 1/2 tbsp White wine vinegar
  • 1 tbsp Heavy cream
  • 1 tsp Lemon zest
  • 1/2 cup Unsalted butter (cut into small teaspoon-sized cubes, very cold)
  • 1/4 tsp Sea salt (to taste)

Instructions

  1. Preheat the Oven: Set your oven to 400°F (204°C) to prepare for baking the sea bass fillets.
  2. Prepare the Olive Oil Mixture: In a small bowl, whisk together olive oil, lemon juice, and garlic powder to create a flavorful brush for the fish.
  3. Prepare the Sea Bass: Arrange the sea bass fillets in a stoneware baking dish with space between each. Use paper towels to pat them dry thoroughly to ensure even cooking and browning.
  4. Season the Fish: Brush both sides of the sea bass fillets with the olive oil mixture. Then season both sides with garlic powder, sea salt, and black pepper evenly.
  5. Bake the Sea Bass: Place the baking dish in the preheated oven and bake for 12 to 15 minutes, or until the internal temperature reaches 135 to 140°F. The fish should flake easily when done; using an instant-read thermometer is recommended for accuracy.
  6. Prepare the Beurre Blanc Sauce Base: While the fish bakes, combine minced shallot, white wine, and white wine vinegar in a very small saucepan over medium-high heat. Bring to a boil, then reduce heat to medium and simmer for 3 to 5 minutes until the liquid reduces to about one-quarter of the original volume (approximately 2 tablespoons).
  7. Add Cream and Lemon Zest: Stir in the heavy cream and lemon zest to the reduced liquid, blending flavors for the sauce.
  8. Incorporate Butter: Lower the heat to very low. Add cold butter cubes in small batches (2-3 at a time), stirring continuously until each batch melts before adding more. This careful technique prevents the sauce from separating.
  9. Season the Sauce: Add sea salt to taste, adjusting seasoning as necessary.
  10. Serve: Pour the warm beurre blanc sauce over the baked sea bass immediately. Alternatively, keep the sauce warm in the saucepan with heat off or in a thermos for up to 30-60 minutes, ensuring it doesn’t overheat or cool too much to prevent splitting.

Notes

  • Use an instant-read thermometer to ensure the sea bass is perfectly cooked at 135-140°F for optimal texture.
  • Keep the butter cubes very cold and add them gradually to the sauce off direct heat to prevent separation.
  • If the beurre blanc sauce starts to separate, whisk in a small splash of cold water or remove it from heat immediately.
  • Patting the fish dry before seasoning helps achieve a better sear and texture during baking.
  • The recipe can be easily doubled or halved depending on serving needs.

Keywords: Chilean sea bass, baked sea bass, beurre blanc, quick seafood recipe, lemon butter sauce, elegant dinner