8oz Icing/Confectioners Sugar
2 Large Heaped Tablespoons of peanut butter(can be crunchy or smooth.)
-Whisk the butter and peanut butter until smoothish(depending on whether you've used smooth or crunchy) and creamy.
-Add the Icing sugar a bit at a time and whisk unless you want it to go everywhere! Continue until you get the desired texture and taste.
If it is too thick you can either add a bit more peanut butter or a teaspoon of milk. If it is too runny add more icing sugar.