1 box yellow cake mix
3/4 c. creamy peanut butter
1 (8 oz.) Hershey chocolate bar
1 tsp. oil

Mix cake according to package directions and pour into greased cookie sheet with sides. Bake about 20 to 25 minutes. While still hot spread peanut butter over cake and let cool in refrigerator. Melt chocolate on stove with oil and spread over cold peanut butter and refrigerate. Bring cake to room temperature before cutting.