- thinned royal icing
- food color
- pastry bags with tip #3 or #4 or parchment bag cut with a hole
Place the icing in a bag with a tip #3 or #4. Outline the area to be covered. Quickly fill in the outline. If the icing is running off the cookie, too much water was added to the royal icing. If the icing is not smooth, add a bit more water to the royal icing. When icing crusts, pipe adjoining color. For added dimension or outlining, allow icing to harden (several minutes) and pipe on the top.