Place your bananas in a paper bag to ripen if they are too green.
To ripen the bananas even faster, try placing an apple or tomato in the bag along with the bananas.
Put especially green bananas into a plastic bag, seal, and place the bag in a warm spot like the top of your refrigerator. This will cause the bananas to heat up, which speeds the ripening process. You can also put other green fruits like peaches and pears into a bag with a ripe banana and they will ripen faster as well.
You can also freeze bananas! Just peel, and store in plastic bags up to 6 months. Thaw and drain frozen extra-ripe bananas and use in baked goods, or slice frozen into blender drinks.
If you want to keep your bananas for a longer period, you can store them in your refrigerator. Because they are a tropical fruit, the refrigeration will cause the banana peel to darken, however the fruit inside will stay firm and delicious.
Source: Kitchen Project
