The Best and Easiest Chocolate Cake Frosting

1 c. soft butter

1/2 c. cocoa

5 c. powdered sugar

1 tsp. vanilla

3-4 tbs. milk

-Whip butter and cocoa until smooth.  Stir in vanilla and 2 c. powdered sugar.  Stream in a little milk, then add more powdered sugar.  Stream in enough milk to desired consistency.  Makes great frosting for cakes or cupcakes.  

Tips:

This makes a lot of frosting!  When I make a 9x13" cake I only use 3/4 c. butter, 1/4 c. + 2 tbs. cocoa, and 3 1/2 c. powdered sugar.  Make the enitre recipe for a 2 tiered 9" layer cake.