Ingredients
1 package chocolate cake mix (regular size)5 tablespoons all-purpose flour1-1/4 cups milk1/2 cup butter, softened1/2 cup shortening1 cup sugarPinch saltFROSTING:1/2 cup butter, softened1/4 cup baking cocoa1 teaspoon vanilla extract3 cups confectioners’ sugar4 to 5 tablespoons hot water
Preparation
Prepare cake batter according to package directions; pour into a greased 15x10x1-in. baking pan. Bake at 350° for 20-25 minutes or until a toothpick inserted in the center comes out clean. Cool on a wire rack.
Meanwhile, for filling, combine flour and milk in a saucepan until smooth. Bring to a boil over medium heat, stirring frequently. Cook and stir for 2 minutes; remove from the heat and cool completely.
In a bowl, cream butter, shortening, sugar and salt until fluffy. Add flour mixture; beat until fluffy, about 4 minutes. Spread over cake. Freeze for 15 minutes. For frosting, beat butter, cocoa and vanilla in a bowl until fluffy. Beat in sugar and water. Spread over filling. Store in the refrigerator.
