Sour Cream Salad Dressing - cooking recipe

Ingredients

2 tablespoons sugar
1 tablespoon flour
1/2 teaspoon dry mustard
1/8 teaspoon paprika
1/4 cup vinegar
1/4 cup water
1 egg yolk, beaten
1 tablespoon butter
1 cup sour cream

Preparation

Mix first four ingredients; add vinegar and water and cook in a double boiler until thickened, stirring constantly.
Pour over egg yolk and butter, return to heat and cook a few minutes longer.
Cool in refrigerator; fold in sour cream.