How ripe should bananas be for banana muffins?
Very ripe. Think heavy brown speckles or even mostly brown peels. The riper they are, the sweeter and more banana-forward your muffins will taste. If your bananas are different sizes, measure the mash: you want about 1 1/2 cups (about 340 g).
Why did my banana muffins turn out dense?
The usual culprit is overmixing. Once the flour goes in, fold just until you do not see dry streaks. Small banana lumps are totally fine, but try not to leave big chunks. Also make sure your baking soda and baking powder are fresh.
Why did my muffins sink in the middle or taste a little “chemical”?
This can happen if the batter is overmixed, the muffins are underbaked, or your oven runs hot and the tops set before the centers catch up. Leaveners can also read stronger in some kitchens. If you notice a soapy or metallic note, or frequent sinking, try reducing the baking powder to 1 teaspoon next time (keep the baking soda the same), and bake until a toothpick comes out with moist crumbs.
My muffins are getting too brown on top. What should I do?
Ovens vary. If your tops brown fast during the hot start, you can shorten the high-heat time to 3 minutes, or start at 400°F instead of 425°F. Liners can also keep sides a bit lighter; greasing the pan tends to brown more.
Can I make these muffins without eggs?
Yes. Swap the egg for 1/4 cup unsweetened applesauce or a flax egg (1 tablespoon ground flax + 3 tablespoons water, rest 10 minutes). The texture will be slightly softer and less springy, but still moist and tasty.
Can I add mix-ins?
Absolutely. Add up to 3/4 cup chocolate chips, chopped walnuts, pecans, or blueberries. Toss blueberries or chips with a teaspoon of flour first if you want less sinking.
How do I know when banana muffins are done?
A toothpick should come out with a few moist crumbs, not wet batter. The tops should spring back when gently pressed, and the muffins will pull slightly away from the pan edges.