Baked Fish Fillets with Mustard Butter

Fish Fillets with Mustard Sauce
Cod with Mustard and Butter Sauce. Philippe Desnerck/Photolibrary/Getty Images
Ratings (7)
  • Total: 15 mins
  • Prep: 5 mins
  • Cook: 10 mins
  • Marinate: 15 mins
  • Yield: Makes 5 to 6 Servings
Nutritional Guidelines (per serving)
298 Calories
16g Fat
2g Carbs
34g Protein
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Nutrition Facts
Servings: Makes 5 to 6 Servings
Amount per serving
Calories 298
% Daily Value*
Total Fat 16g 21%
Saturated Fat 9g 44%
Cholesterol 123mg 41%
Sodium 491mg 21%
Total Carbohydrate 2g 1%
Dietary Fiber 0g 1%
Protein 34g
Calcium 40mg 3%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

Haddock and halibut are excellent in this dish, but you could use salmon, cod, or just about any type of fish in this simple recipe. The seasoned Dijon mustard and butter combination give the fish fabulous flavor.

The recipe takes about 30 to 40 minutes, start to finish, and that includes marinating time! Serve the fillets with baked potatoes or a rice dish, along with roasted Brussels sprouts or your favorite side vegetables.


  • 2 pounds fish fillets (such as haddock, cod, or pollock)
  • 3 cups water
  • 3/4 cup plus 3 tablespoons lemon juice
  • 6 tablespoons butter
  • 1 1/2 tablespoons Dijon mustard (or a similar gourmet mustard)
  • 3/4 teaspoon salt
  • 1/2 teaspoon paprika
  • 1/8 teaspoon black pepper
  • Garnish: chopped parsley

Steps to Make It

  1. Thaw fish if frozen. Cut fillets into serving-size portions, about 6 ounces each.

  2. Place fillets in single layer in a shallow baking dish, about 12x8x2 inches. Combine water and lemon juice and pour over fish. Cover and let the fish marinate in refrigerator for 15 minutes.

  3. Combine the butter, 3 tablespoons of lemon juice, Dijon mustard, salt, paprika, and pepper in a saucepan. Heat until butter is melted.

  4. Heat the broiler (500 F or HIGH) and grease a broiler pan generously.

  5. Arrange the fish fillets on the well-greased broiler pan. Brush the fillets liberally with the mustard and butter mixture.

  6. Broil about 4 inches from source of heat for 5 to 6 minutes;*  turn carefully. Again brush generously with the mustard sauce and broil four to six minutes longer or until fish flakes easily when tested with a fork. 

  7. Arrange on a serving plate and sprinkle with parsley. Heat the remaining mustard-butter sauce  and spoon over the fish. 

*Note: The cooking time for the fish depends on how thick the fillets or steaks are. For fillets measuring about 1 inch at their thickest, cook for about five minutes on each side. A good rule of thumb is 10 minutes total for each inch of fish (thickness).