Delicately crisp to the center, these minty meringue cookies are as light as can be. A simple but clever technique for "striping" the piping bag with food coloring gel creates the handsome swirls. In addition to the gel color, you'll need 2 disposable plastic piping bags (16-inch size) and a fine paint brush; you can get all the supplies at craft stores, specialty baking stores, and online. The recipe is a Yummly original created by Saura Kline.