Creating Banana Nutella Muffins is simple! Follow these steps to enjoy this delicious treat:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C). Prepare a muffin tin by lining it with paper liners or greasing it lightly.
2. Combine Ingredients: In a large mixing bowl, mash the ripe bananas with a fork until smooth. Add the melted butter and mix well.
3. Add Flavorings: Stir in the baking soda and salt. Then, mix in the brown sugar, egg, and vanilla extract until combined.
4. Incorporate Flour: Gradually add the all-purpose flour, mixing just until incorporated. Be careful not to overmix.
5. Add Nutella: Gently fold the Nutella into the batter. Don’t fully mix it in; leave swirls to create beautiful marbling in the muffins.
6. Fill Muffin Tin: Spoon the muffin batter into the prepared muffin tin, filling each cup about 2/3 full.
7. Bake: Place the muffin tin in the preheated oven and bake for 20-25 minutes. Muffins are done when a toothpick inserted in the center comes out clean.
8. Cool: Allow the muffins to cool in the pan for about 5-10 minutes before transferring them to a wire rack to cool completely.
9. Serve: Optional: Drizzle some extra Nutella on top of the warm muffins for a finishing touch.

These steps will ensure that your Banana Nutella Muffins come out fluffy and delicious, making for a delightful treat!