Peanut Butter Sheet Cake

1 C Butter or Margarine
1/4 C Peanut Butter
1 C Hot Water
Combine and bring to boil. Pour over:

2 C Flour
2 C Sugar
1 tsp Baking Soda
Mix Well. Add:

1/2 C Buttermilk
2 Eggs
1 tsp Vanilla.
Mix Well. Pour into a greased jelly roll pan and bake for 20 - 25 min at 350 F (180 C).

For Icing:
Melt in pan on stove:
1/2 C butter or margarine
1/3 C Buttermilk
1/4 C Peanut Butter
Bring to boil and add
1 lb. (450 g) Icing Sugar.
Mix well and add
1 tsp Vanilla.

Ice while still hot.