Ingredients
Method
For Bars
- Preheat oven to 350°. In a large bowl, combine cake mix, egg, milk and oil (mixture will be thick). Stir in baking chips and jimmies. Spread into a greased 15x10x1-in. baking pan.
- Bake 18-20 minutes or until a toothpick inserted in center comes out clean. Cool completely in pan on a wire rack.When cool frost with chocolate buttercream frosting and sprinkle with sprinkles.
For Chocolate Buttercream
- In stand mixer bowl, sift together the confectioners' sugar and cocoa powder. Add butter and cream. Whip with whip attachment until smooth and creamy. Frost cooled bars.