How ripe should bananas be for banana bread?
Go for bananas that are heavily speckled or mostly brown. They should smell sweet and mash easily. Yellow, firm bananas will work, but the flavor will be lighter and the loaf can be less moist.
Can I use frozen bananas?
Yes. Thaw completely, then drain off some of the excess liquid if it seems like a lot. Mash and measure like normal.
Why did my banana bread sink in the middle?
The usual suspects are underbaking, too much banana, or overmixing. Bake until a tester comes out clean or with a few moist crumbs, and mix just until you stop seeing dry flour.
Can I make this banana bread without baking soda?
Baking soda is best here because it plays nicely with the natural acids in very ripe bananas (and any acidic add-ins) and it also helps with browning for that golden, crackly top. If you only have baking powder, you can use 3 teaspoons baking powder instead of the soda, but expect a slightly different flavor and a slightly less lofty rise. Some brands can read a little salty or “baking powder-y,” so if you are sensitive to that, stick with soda when you can.
What is the best pan size?
A standard 9 x 5-inch loaf pan is ideal. An 8.5 x 4.5-inch pan works too, but the loaf may need a little extra bake time.
How do I know it is done?
Look for a deep golden top and a crack down the center. A toothpick inserted in the middle should come out clean or with a few moist crumbs, not wet batter. If you like extra certainty, an instant-read thermometer in the center should read about 200 to 205°F.