1 egg yolk
4 drops red food coloring (might try 6 drops next time)
In small cup or bowl , stir the egg yolk with a small amount of food coloring. Use a clean paintbrush to create designs on the cookies before you bake them.
I thought the icing turned out so fun and festive. I’ll definitely be thinking about adding this to our cooking baking madness next December. This is the perfect icing for people who don’t like treats overly sweet.