I use this recipe all the time with one secret ingredient... Tamarillo when available (I replace half a banana with 3 or 4 Tamarillos which are prepared by scooping out the centres into a bowl including seeds etc mashing them up and add to the wet mixture below
2
cups self raising flour
3/4 tsp bicarb soda
1/3 cup brown sugar
1/4 tsp ground cinnamon
pinch salt
4 over ripe bananas( or 3 and half bananas + 4 Tamarilos)
2 eggs
1/3 cup Maple Syrup
70g melted butter
1/2 cup sour cream
Preheat Oven to 180 C or 160 if fan forced
Grease a loaf tin and line with baking paper
Sift all the dry ingredients into a large bowl.