Source: Everyday Food, 2005
- 1/4 cup confectioners' sugar
- 1 drop yellow or orange food coloring
- 1 teaspoon water
In a small bowl, whisk together confectioners' sugar, food coloring, and water. (Icing should be spreadable but not too thick; add more water, 1 teaspoon at a time, as necessary.) Spread onto tips of shortbread. Let set, 15 minutes.