Place all dry ingredients in a large bowl. Whisk thoroughly until the dry ingredients are thoroughly combined
Remove the skin from the thawed bananas and place the pulp in a a medium sized bowl. Whisk the banana until it is relatively smooth and free of chunks.
Add the remaining wet ingredients to the bananas and whisk until the ingredients are combined
Add the contents of the wet ingredients to the bowl of dry ingredients. Using a wooden spoon or spatula stir until the dry ingredients have been thoroughly mixed into the wet ingredients
Line or grease a standard muffin tray. Divide the mixture into the 12 cups. Each cup should be filled about ⅔ full
Bake for 20-25 mins, depending on your oven. I always check my muffins at the 20 minute mark.