Store unused cupcakes in an airtight container at room temperature for up to 3 days. If you live in a hot climate, consider refrigerating them to keep the frosting fresh. They can also be frozen for up to three months. Just wrap each cupcake individually to preserve freshness, and thaw them at room temperature before serving. Avoid Overfilling: When pouring batter into cupcake liners, fill them about two-thirds full to ensure they rise properly. Be Creative: Mix and match colors and decorations to personalize each cupcake for your event.