Prep Time 15 minutes mins
Cook Time 18 minutes mins
Resting Time 30 minutes mins
Total Time 1 hour hr 3 minutes mins
For best results, avoid overmixing the batter to keep the cupcakes tender, and bring the eggs and milk to room temperature so the batter emulsifies smoothly and bakes evenly. If your Nutella is very firm, gently warming it makes swirling and filling much easier, but avoid overheating or it may soak too much into the crumb. Bake the cupcakes just until set, since overbaking dries chocolate-based batters quickly, and always test in a cake area rather than the Nutella pocket. These cupcakes store well covered at room temperature for a day, or you can refrigerate them for up to three days and let them come back to room temperature before serving for the best texture and flavor.