This two-step sugar cookie frosting recipe provides both outlining and flooding consistencies for beautifully decorated cookies. It's simple to make and can be easily colored to suit any occasion.
For best results, ensure butter is truly softened to room temperature before beating. If the outlining frosting becomes too stiff, add a tiny amount of milk or water to reach the desired consistency. Store frosting in an airtight container at room temperature for up to 3 days or refrigerated for up to 2 weeks; bring to room temperature and re-whip if needed before use.