To make gray icing, start with white icing and add a drop of black food coloring. Mix thoroughly to fully incorporate the colors, and add more black until the desired shade of gray is achieved.Continue Reading
When combined, white and black create gray. Use white icing as the base color, and add a drop of black food coloring to the icing.
Use a whisk or fork to thoroughly mix the black food coloring and icing until a light gray color forms.
Continue adding one drop of black food coloring at a time, mixing well after each drop, until you achieve the desired shade of gray.