Prep Time 20 minutes mins
Cook Time 18 minutes mins
Resting Time 30 minutes mins
Total Time 1 hour hr 8 minutes mins
For best flavor, use strong coffee or espresso in the batter and frosting, and be sure both are cooled before mixing so they don’t curdle the batter or melt the butter. Room-temperature eggs and milk help the cupcakes rise more evenly, and avoiding overmixing after adding the dry ingredients keeps the crumb tender. If your frosting seems too thick, add cream a teaspoon at a time; if too thin, beat in a bit more powdered sugar. These cupcakes taste even better after resting covered for a few hours as the coffee and chocolate flavors meld, and they store well in an airtight container at room temperature for a day or in the refrigerator for up to three days (bring to room temperature before serving).