Question: don't have ripe bananas for banana bread?
Answer: The basic oven-ripening trick goes like this: Place your bananas, still in their peels, on a lined, rimmed baking sheet (because they ooze, sometimes). Turn the oven to 300°F. Bake the bananas until their peels turn black. Let them cool a few minutes before handling, and voila: sweet, mushy bananas for baking.