Julia M. Usher posted:You might have more success with powdered coloring, especially sheens like pearl. I mix the latter in the ratio of 1 1/2 parts to 4 (powder to alcohol, by volume) and I get great coverage on dark cookies.
Thank you so much Julia! I have had so many instances where I tried white airbrush color, but ended up with some "not so pretty" cookies (my kids love it when I have some ugly ones). Thanks again and I'll definitely give this a try!