1/2 cup butter or margarine, softened
2 1/4 cups packed brown sugar
3 eggs
3 (1 ounce) squares unsweetened chocolate, melted and cooled
2 teaspoons vanilla extract
2 1/4 cups all-purpose flour
2 teaspoons baking soda
1/2 teaspoon salt
1 cup sour cream
1 cup water
FROSTING:
1 cup butter or margarine
1 cup peanut butter*
4 cups confectioners' sugar
1/4 cup milk
2 teaspoons vanilla extract
1 cup finely chopped peanuts