Combine powdered sugar and half and half in bowl, adding ONE tablespoon of half and half at a time and whisking slowly to combine. The frosting should be thick but still have some movement to it.
Add extract and food coloring, whisk to combine.
Frost cookies and allow to set for 10-15 minutes before eating. The frosting will harden and should take on a slight shine.
Notes
This is a very forgiving recipe. If too thick, add more half and half. Too thin, more powdered sugar.