This is the gingerbread cookie icing that my mother always made at Christmas.
Ingredients
1 cup confectioners' sugar
¼ cup milk, or as needed
10 drops food coloring
Directions
Gather all ingredients.
Sift confectioners' sugar into a small bowl.
Stir in enough milk to make a smooth but not too runny consistency.
Divide mixture into small containers, depending on how many colors you want. Drop food coloring into each container, using as much food coloring as needed to create desired hues.