Place the bananas on a parchment or foiled-lined baking sheet (for easy clean up). Bake for 15 to 40 minutes (depending on their size and level of unripeness) until they are brown and very soft to the touch. Let cool until warm, then peel and mash.
Notes
A soft, ripe banana can easily be squeezed from the peel. Cut off one end and apply pressure to the other end of the skin to pop the banana out of the skin.
Be sure to let the bananas cool before you try to peel them. If you use one of the heating methods, the ripe fruit will be very hot and will burn if you try to handle them immediately. Cool them to room temperature first.
These methods can be used for any type of banana! If you have baby bananas, red bananas, or even plantains.