Buttery sugar cookies with a tender snap, decorated with glossy royal icing in patriotic colors. Perfect for holidays and parties, these cookies hold their shape well, dry smoothly, and stay fresh at room temperature.
Chill dough at least 1 hour to prevent spreading and keep sharp edges., Use gel food coloring to avoid thinning royal icing and to ensure proper drying., Fully dried iced cookies keep well at room temp for up to a week; avoid refrigeration to maintain icing texture., For crisper edges, substitute half the butter with shortening, but all butter yields best flavor., Bake cookies at 350°F for 8–10 minutes until edges just turn light golden for tender-chewy centers., Practice piping fireworks designs on parchment before decorating cookies., Allow flooded icing to dry naturally overnight without fans or dehydrators for a glossy finish., Freeze cut dough shapes to bake fresh later, adding one minute to baking time when baking from frozen.