2 cups powdered sugar
1/2 teaspoon vanilla
2 tablespoons milk
2 tablespoons half-and-half
Food coloring, if desired
Stir together 2 cups powdered sugar, 1/2 teaspoon vanilla and 2 tablespoons milk or half-and-half until smooth and spreadable. This recipe makes enough to frost 3 to 5 dozen cookies. Add more milk for a thinner frosting or to create a glaze. Frosting can be tinted with food color.
Stir in liquid food color, 1 drop at a time, until frosting is the desired color. If intense, vivid frosting color is desired, use paste food color.
Why? Because you would have to use too much liquid color to get vivid color, and using too much liquid color will break down the frosting, causing it to separate and look curdled.