Using a whisk, mix the types of flour with baking soda and salt in a small bowl.
Preheat the oven to 175 ° C top and bottom heat. Spray a 30cm long loaf pan with baking spray or brush with 1 teaspoon of unflavored oil using a baking brush.
Beat soft butter in flakes with room temperature eggs in a second bowl for at least 5 minutes with a hand mixer. The mass should be fluffy and whitish in color.
Peel the bananas and mash them with a fork. Immediately stir into the butter and egg mixture together with the yogurt and maple syrup. Otherwise the bananas will turn brown and unsightly very quickly! Using a whisk, fold in the flour mixture quickly and carefully. Pour the batter into the loaf pan and smooth the surface.
Place the cake on the lower rail of the oven and bake in about 40-45 minutes. Do a chopstick test!
Then let it rest for about 10 minutes in the tin on a wire rack. Then turn out of the mold, turn the cake around and let cool down completely.