01 -
Turn the oven on and get it heating up to 175°C.
02 -
Oil a 23 x 13 cm loaf pan well.
03 -
Grab a medium bowl and combine the flour, cocoa powder, baking powder, and salt. Keep it aside.
04 -
Using a big bowl, mash up the bananas with a fork. Stir in the melted butter, the vegetable oil, the egg, and the vanilla. Mix thoroughly.
05 -
Throw the brown sugar into your wet ingredients and stir until it's blended in.
06 -
Slowly add the dry stuff into the wet mixture. Stir gently and avoid overmixing the batter.
07 -
Fold in 3/4 of the chocolate chips along with the chopped walnuts. Don't overdo it.
08 -
Pour the batter into the loaf pan. Sprinkle the remaining chocolate chips evenly on top.
09 -
Pop it in the oven and bake for 50–60 minutes. Stick a toothpick in the center to check—it should come out clean.
10 -
Let it chill out for a bit before slicing up. Store leftovers in the fridge or freezer if needed.