How ripe should bananas be for baking?
Riper than you think. You want bananas with lots of brown speckles or even mostly brown skins. They mash easily and taste sweeter, which gives you more banana flavor without needing extra sugar.
Can I use frozen bananas?
Yes. Thaw completely, then drain off a little excess liquid if it looks watery. Mash and measure like normal. Frozen bananas can be extra wet, so draining can help prevent dense muffins.
Why did my muffins turn out dense?
Usually it is one of three things: overmixing (gluten gets bossy), too much banana (it makes the batter heavy and wet), or not enough leavening. Mix just until the flour disappears, use a level teaspoon measure for baking soda and baking powder, and measure your mashed banana to 1 1/4 cups for the best texture.
Can I make these without eggs?
You can. Swap in a flax egg (1 tablespoon ground flax + 3 tablespoons water, rest 5 minutes). The muffins will be slightly more tender and a little less lofty, but still very good.
How do I keep chocolate chips from sinking?
Toss them with 1 teaspoon of flour before folding into the batter. Also, save a few to sprinkle on top so every muffin looks intentional.
How do I know when they are done?
A toothpick should come out clean or with a few moist crumbs. If you like numbers, the center of a muffin should be around 200 to 205°F on an instant-read thermometer.