Here is a light Lemon Caper Sauce made with eight tablespoons of butter. What. It's delicious. In your mouth, but particularly spooned over fish.
Lemon Caper Sauce - adapted from Sous Vide for the Home Cook
8 T unsalted butter
1 small shallot, minced
1/4 cup capers, drained
Juice of 1 lemon
1/4 tsp anchovy paste
Salt and pepper to taste
Melt 2 T of the butter in a skillet over medium-low heat. Add the shallot and cook until it's tender and translucent.
Stir in the remaining butter, capers, lemon juice and anchovy paste. Continue to cook, stirring frequently, until the sauce is smooth, about 10 minutes.
Season with salt and pepper and spoon over fish.