1 pkg. white cake mix (no pudding)
1 pkg. instant chocolate pudding
2 eggs
2 c. cold water

Mix all together and put in 9 by 13 inch pan. Bake at 350 degrees for 30 to 40 minutes. Cool before frosting.

FROSTING:

1/4 c. butter
2 egg yolks
1 c. sugar

Cream together. Fold in one 8 ounce Cool Whip. Spread on cake and put 3 crushed Heath bars on top. Refrigerate.