1cupmashed ripe banana2 large or 3 medium bananas (see note 1)
2cupsall-purpose floursee note #2
½cuporganic white sugarsee note #3
⅓cupmelted vegan butteroil also works
Preheat oven to 350 degrees F. Make a flaxseed "egg" by combining 1 tablespoon ground flaxseed with 3 tablespoons water in a small bowl. Let rest for 5 minutes before using.
Combine all dry ingredients in a large mixing bowl: all purpose flour, sugar, baking powder, baking soda, salt, cinnamon, nutmeg. Stir to combine.
Add wet ingredients to dry ingredients: mashed banana, flax egg, soy milk, melted butter, vanilla extract. . Stir until mostly cohesive. Don't overmix. It is okay if some small lumps remain. The batter should be wet but scoopable. If it is too runny, add ¼ cup flour. If it is took dry, add 2 tablespoons soy milk.
Line a 12 cup muffin tin with liners or lightly spray with cooking oil (I usually just spray instead of using liners). Add ~⅓ cup batter to each cup, evening out as needed.
Bake on the middle oven rack at 350F for 18-20 minutes, or until a toothpick inserted in the center of a muffin comes out clean.
Remove from oven and let rest in muffin tin for 5 minutes before turning out on a wire rack to cool.
Bananas: Use very ripe bananas. The banana skin should be turning brown or at least heavily speckled (see reference image in post). Use a potato masher or fork to mash the banana until wet and completely broken down.
Flour: These muffins can be made with half whole wheat in place of white wheat. It will yield a slightly denser muffin. Use the spoon and level method to measure flour. Take a spoon and scoop flour into the measuring cup until overflowing. Use the back of a knife to wipe excess flour off the top. Do not pack flour into cup.
Sugar: I don't recommend replacing white sugar with maple syrup or any other liquid sweetener. You can add ¼ cup brown sugar in place of ¼ cup white sugar for a richer taste.
I recommend using an oven thermometer. Oven temperatures can vary widely and the only way to know if your oven is the temperature it says it is is to use an oven thermometer.
Add-ins: Fold in up to ½ cup chocolate chips, chopped nuts, or your other favorite add-in to the batter.