Preheat oven to 180°C.
In a bowl, cream together butter and sugar for 3 minutes.
Add the aquafaba and beat for one more minute.
In another bowl combine flour, baking powder and baking soda.
Mash bananas in a bowl and mix it to the butter mixture along with vanilla.
Beat until combined.
Add the flour mixture and beat until combined.
Pour it into a greased 7 1/2" * 4 1/2 " loaf tin and smooth the top.
Bake for 40-45 minutes or until a tooth pick inserted comes out clean.
Remove from oven and allow it to cool in the pan for 15 minutes.
Flip it on to a wire rack and allow it to cool completely before slicing.
