1 pkg. Betty Crocker cake mix, French vanilla
3/4 c. peanut butter

Frosting:

1 c. peanut butter
1 stick butter
1/2 tsp. vanilla extract
1 pkg. powdered sugar
milk

Mix cake as directed on box, adding 3/4 c. peanut butter.

Bake as directed. Cool layers. In mixing bowl cream butter, peanut butter and vanilla, slowly add powdered sugar and enough milk to make frosting creamy. Frost cake when cooled.