210 grams (1 and 1/2 cup) plain flour or all purpose flour
1 teaspoon baking soda
1 and 1/2 teaspoons baking powder
90 grams (1/2 cup) brown sugar
1 teaspoon ground cinnamon
115 grams (1/2 cup or 1 stick) butter
2 large eggs
1 teaspoon vanilla extract
60 ml (1/4 cup) buttermilk*
180 grams (3/4 cup) mashed banana, (use 2–3 overripe bananas)
100 grams (1/3 cup) Nutella