Preheat the oven to 180°c fan.
Line a baking tray with baking paper (I used a 25x25cm tin).
Mix the Nutella, eggs and self raising flour together really well, until it has no lumps. (This might take a good few minutes.)
Pour the batter in to your tin.
Dollop the remaining Nutella on to the top of the batter and swirl. Sprinkle with sea salt if using.
Bake for 30 minutes, or until the edges are just solid but the middle still has a little wobble. Don't overbake them!
Ovens do vary so don't be alarmed if you recipe takes that little bit longer. Brownies are better under-done than over.
Enjoy!
Did you make this recipe? Click here to let us know how it went and give it a ⭐️ rating! Your feedback helps us to make more recipes you really want.