@UberFacts: 15 mins to make this simple microwaveable Nutella Mug Cake recipe! Here's how to make it: 4 Tbsp flour 1/4 tsp baking powder 1/4 cup Nutella 3 Tbsp milk Whisk everything together in a large mug until smooth. Then, bake in microwave for 1 minute. The cake is cooked if a sharp knife inserted comes out clean. If not, bake for an extra 20 seconds. Cool completely, then dig in!