A chocolatey, nutty bar.
1/2 cup butter
1/2 cup margarine
1 cup packed brown sugar
1 egg yolk
1 teaspoon vanilla
2 cups all-purpose flour
8 ounces semisweet chocolate morsels
1 cup chopped walnuts or pecans
Preheat oven 350F.
Beat butter and margarine, add sugar, and beat till fluffy. Add egg yolk and vanilla; beat well. Gradually add flour to mixture, constantly mixing.
Press evenly into an ungreased 15x10x1-inch cookie sheet. Bake for 15–18 minutes. Remove from oven and immediately sprinkle chocolate morsels over the top. When chocolate is softened, spread it evenly with a rubber spatula. Top with chopped nuts. Cut bars while warm into 2×2-inch squares.