1 cup all-purpose flour
1 teaspoon baking powder
1/2 teaspoon salt
1 cup cooked, mashed sweet potatoes
1/3 cup butter or margarine, melted
1 egg, beaten
Combine flour, baking powder, and salt. Stir in remaining ingredients, blending well. Refrigerate dough at least 2 hours. Turn dough out onto a lightly floured surface. Roll to 1/4-inch thickness; trim to 1/2 inch larger than casserole.