Banana Oatmeal Muffins

0 Preheat your oven to 350°F (175°C). Line a muffin tin with paper liners or grease it with non-stick cooking spray.
1 In a mixing bowl, combine the old-fashioned oats, all-purpose flour, brown sugar or coconut sugar, baking powder, baking soda, salt, and cinnamon. Stir until the dry ingredients are well combined.
2 In a separate bowl, whisk the egg. Add the melted coconut oil and vanilla extract to the bowl, and whisk again until the wet ingredients are well combined.
3 Mash the ripe bananas with a fork until smooth and add them to the bowl with the wet ingredients. Stir until everything is thoroughly mixed.
4 Gradually add the wet ingredients to the dry ingredients. Mix until just combined. Be careful not to overmix, as it can result in denser muffins.
5 Using a spoon or scoop, fill each muffin cup about three-fourths full with the batter.
6 Bake in the preheated oven for 18-20 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
7 Remove the muffins from the oven and let them cool in the tin for a few minutes. Then transfer them to a wire rack to cool completely.