In a saucepan, warm up the milk with Nutella until Nutella is melted completely and it's just before boiling point.

Take it off, pour in the mug/cup and press latte to froth the milk and brew the coffee.

Add Whipped cream; Stir and enjoy!

For frothing with hand-frother:

Step 1. From the previews, then --> Place milk only into the sauce (a (1/2 cup), cook on the medium-low until boiling point and at the same time froth milk with hand-frother until it starts to bubble and develops that thicker foam.

Pour brewed coffee of your choice into milk+nutella mixture, and slowly add frothed milk to your latte until it reaches the rim of the mug -add less though, if you going to put whipped cream on top.

Add whipped cream if desired!