Chocolate Frosting

This is the recipe for that yummy chocolate frosting that I posted about earlier. My husband who is not a chocolate lover even liked this frosting, I promise, it is yummy!
1/3 cup butter or margarine (I use butter)
1/4 cup cocoa
1/2 tsp vanilla
2 T milk
1 3/4 cup powdered sugar
Melt butter and stir in cocoa. Add vanilla and milk. Gradually add powdered sugar until it reaches desired thickness (use more than the recipe calls for if you want really thick frosting). Add more milk 1 tsp at a time if it is too thick.