- 1 egg yolk
- 1 teaspoon water
- 5 drops food coloring
- Mix egg yolk and water. Divide into dishes for as many colors as you want to make. Add food coloring to get shade desired (e.g., 2 Red plus 2 Yellow for Orange; 3 Blue for Blue).
- Paint on unbaked cookies and bake as you normally would. Cookies will come out with a shiny color finish.