Lightly grease a 9x5 inch (23x13cm) loaf pan the line with non-stick parchment paper. Preheat the oven to 350ºF (180ºC).
Whisk (or sieve) together flour, sugars, baking soda, cinnamon, salt.
Mash bananas well.
Whisk eggs, melted butter, milk and vanilla.
Stir wet ingredients and mashed bananas into dry ingredients. Don’t overmix.
Pour half of the batter into the prepared loaf pan.
Warm the nutella in the microwave for 20 seconds. Dollop half Nutella onto the batter in the loaf pan.
Dollop on remaining batter followed by remaining Nutella. Swirl the batter and the Nutella with a knife until just swirling together - don’t completely mix the Nutella in.
Bake for 45-50 minutes. To test if it’s ready, stick a skewer or toothpick into the bread and when removed there will be no batter clinging to it. There may be a few crumbs - that’s fine.
Cool in the pan for 15 minutes. Then tip it out gently onto a wire rack to cool completely (or eat warm!)
Notes
Tips for Success
If the bananas are small, use 3 or 4 bananas.
Use really ripe bananas that are sweet and flavorsome.
Don't over beat the batter after you've mixed the dry and wet ingredients.
Also don’t over-mix the batter and the Nutella in the final steps.
Read the post fully for more suggestions for “Variations” and “FAQ’s”.