Preheat oven to 350°F (180°C). Line two 12-hole baby muffin trays with coconut oil. Set aside.
In a large mixing bowl, mash bananas until smooth. Then, stir in all the wet ingredients: milk, melted coconut oil, vanilla extract, and egg.
Whisk in until the ingredients are well combined.
Stir in flour, baby cereals, baking powder, baking soda until it forms a consistent batter.
Fill each muffin hole up to 3/4 and bake in the center rack of the oven for about 25- 35 minutes or until golden brown and a skewer inserted in the center of the muffins comes out clean.
Cool on a cooling rack before eating.