You will also need a large mixing bowl, a beater and a spatula.
In the large bowl, combine the butter and cocoa powder.
For a better consistency, do not use margarine in place of butter.
Beat these ingredients on a medium speed until mixed thoroughly.
Next, add in the milk, vanilla extract and salt.
Beat at medium speed until smooth.
Gradually add in the confectioners sugar, continuing to beat a medium speed until the icing is smooth and creamy. #For a thinner icing, add 1/2 teaspoon of milk while beating.