In a large bowl, beat the coconut oil and maple syrup or honey together with a whisk. Add eggs and beat well. Mix in the mashed bananas and milk, followed by the baking soda, vanilla extract, salt and cinnamon.
Preheat oven to 325 degrees Fahrenheit (165 degrees Celsius). If necessary, grease 11 cups of your muffin tin with butter or non-stick cooking spray (my pan is non-stick and didn’t require any grease).