Creating Banana Blueberry Muffins is straightforward. Follow these steps to ensure your muffins turn out perfect every time:

1. Preheat your oven to 350°F (175°C) and line a muffin tin with paper liners or grease it.
2. In a large bowl, mash the ripe bananas with a fork until smooth.
3. Add the melted butter to the mashed bananas and mix well.
4. Incorporate the eggs and vanilla extract into the banana mixture, stirring until fully combined.
5. In a separate bowl, whisk together the flour, sugar, baking soda, baking powder, salt, and cinnamon (if using).
6. Gradually add the dry ingredients to the wet ingredients, stirring gently until just combined. Be careful not to overmix.
7. Fold in the blueberries gently to avoid breaking them.
8. Divide the batter evenly among the muffin cups, filling each about two-thirds full.
9. Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted into the center comes out clean.
10. Allow the muffins to cool in the pan for about 10 minutes before transferring them to a wire rack to cool completely.

By following these simple steps, you’ll create a batch of moist and flavorful Banana Blueberry Muffins that everyone will love!