Preheat the oven to 350F/177C convection (325F/163C conventional + a few more minutes of bake time). Grease and line a 9”x5” loaf pan with baking spray and parchment paper.
In a medium bowl, mash the bananas until it looks like puree and there are no more large chunks.
3 (400g or 1 3/4 cup) large ripe bananas
In a large bowl whisk together the sugar and oil until they're combined.
1 cup (200g) granulated sugar, 1/2 cup (118mL) vegetable oil
Add the eggs, one at a time, whisking until each one is fully incorporated.
3 large eggs
Then add the greek yogurt and vanilla, whisking for 2 minutes, until they are completely smooth.
1/4 cup (56g) greek yogurt, 1 tsp vanilla extract
Add in the mashed bananas and whisk until it’s combined.
Fold in the flour, baking powder and salt just until the last streak of flour is combined.
2 1/4 cups (270g) all-purpose flour, 1 Tbsp baking powder, 1/2 tsp fine sea salt
Fold in half of the walnuts and a 3/4 of the chocolate chips.
2/3 cup (4oz) mini semi-sweet chocolate chips, 1/2 cup (4oz) finely chopped or roughly ground walnuts
Toss the rest of the walnuts with 1-2 Tbsp of sugar.
1-2 Tbsp (12-25g) granulated sugar
Pour half of the batter into the prepared loaf pan and sprinkle some chocolate chips and half of the sugared walnuts on top. Then pour in the rest of the batter and with top the rest of the chocolate chips and sugared walnuts.
Bake for 60ish minutes, (insert a knife in the center and make sure no raw batter comes out on it). Remove from the oven and let it cool in the pan for 30-60 minutes.