Creamy Peanut Butter Frosting

1 c. softened butter
1 c. creamy peanut butter
4 c. powdered sugar
1/4 c. whole milk or cream
2 tsp. vanilla

Cream butter & peanut butter together for a couple minutes.  Add half the powdered sugar and blend.  Add milk and vanilla.  Add rest of powdered sugar.  Mix until smooth.

Note:  I recommend NOT using "natural" peanut butters as it messes up the texture.  Plain old-school Jif works great.  ;)