What happens next?

How to bake eggless chocolate chip banana muffins
Preheat your oven to 425 degrees fahrenheit.
You'll be lowering the temperature to 400f as soon as the oven is preheated and you're about to put the muffins in. Doing this helps the muffins to rise.
Measure and combine your dry ingredients (the flour, sugar, baking powder and salt) in a large bowl. Peel and mash your banana in a bowl (large enough to hold 2 cups).