1 box yellow cake mix
2 eggs, beaten
1 1/3 c. water
1/2 c. crunchy peanut butter

ICING:

1/2 c. crunchy peanut butter
1/4 c. softened butter
6 tbsp. cream or half and half
3 1/2 c. (1 lb.) powdered sugar
Dash salt
1 tsp. vanilla

Preheat oven to 350 degrees. Grease and flour a 9x13 inch cake pan. Combine cake mix, eggs, water and peanut butter; blend well. Pour into prepared pan. Bake 33-38 minutes.

To prepare icing, cream peanut butter and butter. Gradually add cream or half and half, sugar, salt, and vanilla. Spread on the cooled cake. Refrigerate.