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 firm, tart apples that hold their shape during baking, and dice them small so they distribute evenly through the batter. Make sure all refrigerated ingredients are at room temperature to avoid a dense crumb. Do not overmix once the flour is added, as that can toughen the cupcakes. If the frosting becomes too thick, add a few drops of milk; if it is too thin, add a bit more powdered sugar. These cupcakes are best enjoyed the day they are made, but you can store them covered at room temperature for a day or refrigerated for up to three days, bringing them back to room temperature before serving for the best texture and flavor.