Creating Easy 3-Ingredient Banana Oatmeal Muffins is straightforward. Just follow these easy steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and line a muffin tin with paper liners or grease it lightly.
2. Mash Bananas: In a mixing bowl, mash the ripe bananas until smooth using a fork or potato masher.
3. Combine Ingredients: Add the rolled oats and milk to the mashed bananas. If desired, include vanilla extract and cinnamon. Mix until all ingredients are well combined.
4. Add Mix-Ins: If you’re using chocolate chips or nuts, fold them into the mixture at this point.
5. Fill Muffin Tin: Spoon the batter into the prepared muffin tin, filling each cup about ¾ full.
6. Bake: Bake in the preheated oven for 15-20 minutes or until the muffins are golden brown and a toothpick inserted into the center comes out clean.
7. Cool: Remove from the oven and allow to cool in the pan for 5 minutes before transferring to a wire rack to cool completely.
8. Enjoy: These muffins can be enjoyed warm or at room temperature!

By following these steps, you’ll have a delicious batch of muffins ready to be savored. Enjoy the wonderful aroma wafting through your kitchen during baking!