1 c creamy peanut butter
8 tbs (1 stick) butter, at room temp
2 c confectioners' sugar, sifted
3 to 4 tbs milk
2 tsp vanilla extract
1. Place the peanut butter and butter in a large mixing bowl. Blend with an electric mixer on low speed until fluffy, 30 seconds. Stop the machine. Add the confectioners' sugar, 3 tbs milk, and the vanilla. Blend with the mixer on low speed until the sugar is well combined, 1 minute. Increase the speed to medium and beat until the frosting lightens and is fluffy, 1 minute more. Blend in up to 1 tbs milk if the frosting seems too stiff.
2. Use at once to frost a cake of choice.
This is excellent on Mayo Chocolate Cake
