In a large microwavable mug add the Nutella,oil and egg and whisk together.

Add flour and mix until you have a smooth batter.
Microwave for roughly 50 seconds - 1 minute. Always keep a close eye on your mug while in the microwave so it doesn’t overflow or overcook.

When the brownie is set and firm on top it is done. Let the brownie cool and minutes before serving
Serve with some your favourite ice cream while it’s still warm.

✅Notes:

Cooking time will vary depending on your microwave and the width and depth of the mug.