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Lemon Sauce for Fish – Easy 20-Minute Weeknight Dinner
Emily

Lemon Sauce for Fish

A tangy, creamy lemon sauce that perfectly complements fish dishes. Made with fresh lemon juice, cream, butter, and mustard, it’s rich, flavorful, and ready in minutes.
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Prep Time 5 minutes
Cook Time 10 minutes
Total Time 15 minutes
Servings: 4 servings
Course: Sauce
Cuisine: European, French
Calories: 145
Ingredients Equipment Method Notes

Ingredients
  

  • 2 lemons, juiced
  • 100 ml heavy cream
  • 50 g butter
  • 1 tbsp mustard
  • 1 tbsp flour
  • salt and pepper, to taste
  • chopped parsley (optional)

Equipment

  • Saucepan
  • Whisk
  • Measuring cups and spoons
  • knife
  • cutting board

Method
 

  1. Melt the butter in a saucepan over medium heat, then stir in the flour to create a roux.
  2. Gradually add the lemon juice, stirring constantly.
  3. Mix in the heavy cream and mustard, stirring well.
  4. Simmer the sauce until it thickens slightly.
  5. Season with salt and pepper, and garnish with parsley if desired.

Notes

This sauce pairs beautifully with white fish such as cod, halibut, or tilapia, but it also works with salmon. Add a pinch of cayenne or garlic for extra depth. Serve warm over freshly cooked fish.