The basic meringue-style French macaron is merely the springboard for your wildest color and flavor combinations. Try adding a teaspoon of Dutch-process cocoa and red gel food coloring for a red velvet macaron, or a 1/4 teaspoon rose extract and pink gel food coloring for rose. Always add the dry flavorings to the almond meal/powdered sugar mixture and the extracts/gel color to the meringue.