Without a doubt the best Peanut Butter Frosting I have ever made. Creamy, great flavor,and has never glazed over or got that "crusty" look to it like some frostings do once they have set up. With this recipe you can also omit the milk and you have a great peanut butter filling to sandwich in between cake layers. If by chance the frosting looks a bit stiff, you can blend in up to 1-2 more tablespoons of milk, just do so slowly and mix well before adding more. This makes 3 cups of frosting, enough to frost a 2 or 3 layer cake or a 13 by 9 inch sheet cake with some to spare. I hope you love this recipe as much as I do.