• 1 Tbsp butter, softened
• 1 tsp vanilla
• 2 1/2 C powdered sugar
• 3 Tbsp skim milk
• 2 drops of food color (I ended up using more)

Soften the butter then stir in the vanilla.  Add the powdered sugar and milk and stir well.  If needed, add just a touch of milk and stir until the frosting reaches the desired consistency.  Stir in food coloring (and any flavoring, if desired).