Prep Time 20 minutes mins
Cook Time 18 minutes mins
Resting Time 45 minutes mins
Total Time 1 hour hr 23 minutes mins
For best flavor, use fresh oranges for both zest and juice, as the essential oils in the zest create that classic creamsicle aroma; avoid overmixing the batter once the flour is added to keep the cupcakes tender and light. Bring cold ingredients like eggs, sour cream and cream cheese to room temperature (except the whipping cream) so they incorporate smoothly without lumps. If your frosting seems too soft, chill it for 10–15 minutes and rewhip briefly, or add a little more powdered sugar to firm it up. Cupcakes can be baked a day ahead and stored covered at room temperature, then filled and frosted the day of serving; keep finished cupcakes refrigerated if holding longer than 2 hours and let them sit at room temperature for about 15 minutes before eating for the creamiest texture and best flavor.