These gluten-free banana muffins are moist, fluffy, and full of overripe bananas! They've got that beautifully domed muffin top, a must-have for bakery-style muffins!
In a bowl, combine gluten-free flour, cornstarch, salt, baking soda, baking powder, and cinnamon. Set the bowl aside.
In a separate bowl, combine the oil, granulated sugar, brown sugar, eggs, mashed bananas, milk, and vanilla.
Add the flour mixture to the banana mixture and mix until smooth. Fold in mix-ins if adding any, cover the bowl, and set it aside to let the flour hydrate for 30 minutes.
Preheat the oven to 410°F (210°C) and line a muffin pan with paper liners. Evenly divide the muffin batter into the paper liners and bake for 7 minutes, then turn down the temperature without opening the oven to 375°F (190°C) and bake for an additional 15-17 minutes, or until a toothpick inserted into the center comes out clean, or with a couple of crumbs.
Cool in the pan for 5 minutes before taking them out onto a wire rack to cool completely.
Notes
Dairy-Free: Swap out the milk for unsweetened non-dairy milk.