1/2 cup creamy peanut butter
2 Tbl. butter, softened
3 Tbl. heavy cream
2 cups confectioner's sugar
Beat peanut butter and butter until smooth with an electric mixer. Add cream and sugar and beat until creamy.
I have made this with crunchy peanut butter and it's great but I had to add an extra 1/4 cup of peanut butter to get the creamy texture for the icing. Also, don't use "natural-style" peanut butter. The consistency of the frosting will not come out smooth.