Put bananas in a paper bag
Add an apple or ripe avocado to the bag
Fold the bag closed loosely
Keep the bag at room temperature
Check every 12 to 24 hours
Place bananas in a warm spot, not direct sunlight
Separate bananas from the bunch if you want them to ripen faster
Wrap the stems with plastic wrap to trap ethylene
Use a preheated oven for baking needs only
Bake unpeeled bananas at 300°F for 15 to 20 minutes
Microwave peeled bananas for 30 to 60 seconds if you need them very soft quickly