01 -
Leave the cookies to sit for 20-24 hours before stacking them up
02 -
Start with piping the edges, then fill the middle. Use a toothpick to close any empty spots
03 -
Mix a bit more milk into the left-over icing until it quickly blends when stirred
04 -
Slowly pour in milk until the icing takes about 3-4 seconds to settle back down. Save one-third for outlining
05 -
If you’d like, mix food coloring into both icings
06 -
Stir together the powdered sugar, 5 tablespoons milk, vanilla, and corn syrup until smooth and combined