1 box cake mix
1 stick butter
1 lg. container Cool Whip
6-12 oz. pkg. chocolate chips

Bake cake as directed in 2 round or square pans. Cut each cake into two layers. Melt butter and chips together. Layer cake as follows:

Cake on bottom

Melted chip mixture

Cool Whip

Repeat this three times. Freeze at least 4 to 5 hours, overnight is best. Serve frozen.