Cake:
1 box chocolate cake mix
1 cup water
3 eggs
1/2 cup creamy or crunchy peanut butter
1/3 cup softened butter or margarine
Peanut Butter Glaze:
1/4 cup creamy or crunchy peanut butter
1 can vanilla or cream cheese frosting OR 1/4 cup milk + 1 cup powdered sugar
Optional Topping:
1/4 cup fudge sauce
Mini peanut butter cups, halved