3/4 c. butter
1 c. mini chocolate chips
1 1/2 c. sugar
1 1/2 c. flour
1 tsp. baking powder
1/2 tsp. salt
4 eggs (be careful to not cook eggs while adding to hot mixture)
1 tsp. vanilla
1/2 c. nuts (opt.)

Heat butter and chips until melted. Stir in rest of ingredients. Spread in jelly roll pan and bake 20 to 25 minutes at 350 degrees. Cool completely. Cut in 4 pieces.

FROSTING:

8 oz. tub Cool Whip, chilled
1/4-1/2 c. powdered sugar
1 tsp. vanilla
2/3 c. mini chocolate chips

Beat cream sugar and vanilla in chilled bowl until stiff. Stir in chips. Stack 4 pieces of cake on top of one another with frosting between each layer and also covering entire cake.