Buttercream Cake Frosting Icing for Egg Allergy

This simple and delicious egg allergy safe, butter cream cake frosting can be refrigerated a day in advance.

2 Sticks of Butter (softened)
3 Cups of Confectioners Frosting
1 Tablespoon Vanilla Extract
4 Tablespoons of Whole Milk

Mix the butter until fluffy.
Add all the remaining ingredients in mixer until well blended and fluffy. 
Frost the cake or cupcakes (they must be completely cooled or icing will melt).

For double layer cake icing, double the recipe.