As a banana ripens, the starch in the fruit turns to sugar. The riper the banana the sweeter the banana is.u003cbr/u003eu003cbr/u003eBanana bread tastes best when made with really ripe bananas. Ripe bananas should have started to form brown spots on the skin and begun to soften.u003cbr/u003eu003cbr/u003eLetting your bananas ripen even longer, until the skins are mostly brown and the fruit falls apart when you peel it, will give your bread an even stronger banana flavor.