How ripe should the bananas be?
Riper than you think. You want very speckled or mostly brown peels. The bananas should mash easily and smell sweet. If they are still yellow, your bread will be less sweet and less “banana-y.”
Can I make this gluten-free?
Yes. Use a 1:1 gluten-free baking flour that includes xanthan gum. Brands vary, so the loaf may bake up more delicate. Let it cool completely before slicing, and plan to adjust bake time as needed. Start checking around 50 minutes, and keep going until the center is set.
What can I use instead of coconut oil?
Neutral oil (canola, vegetable, avocado) works great in the same amount. If you prefer, you can use melted vegan butter, but keep an eye on browning.
Why did my banana bread sink in the middle?
Usually one of three things: the loaf was underbaked, the batter was overmixed, or the oven temperature was running low. Bake until a toothpick comes out with a few moist crumbs, not wet batter. And mix just until the flour disappears.
Can I reduce the sugar?
You can reduce the total sugar by about 1/4 cup without major texture changes, especially if your bananas are very ripe. The loaf will be less caramel-y and a bit less moist, but still good.
How do I know it is done if my toothpick test always lies to me?
If you have an instant-read thermometer, aim for an internal temperature of about 200 to 205°F (about 93 to 96°C) in the center. That plus a set, springy top is a very reliable combo.