Mix the dry ingredients

• Take a microwave-safe mug and add the flour, cocoa powder, sugar, baking powder and salt.
• Mix well until there are no lumps left.

Add the wet ingredients

• Pour in the milk and the oil.
• Mix everything together into a smooth batter (no egg needed).

Add the chocolate chips

• Stir in the milk chocolate chips, as many as you like.
• Wipe the edges of the mug clean so they don't overcook and burn in the microwave.

Microwave the cake

• Microwave for 1 to 2 minutes, depending on how strong your microwave is.

Top and serve

• Top the warm cake with Nutella and enjoy straight away.