Preheat your oven to 355°F (180°C). Grease or line a muffin tin with paper liners.
In a big bowl, smash the ripe bananas until they're smooth.
Add the fresh blueberries to the mashed bananas and gently crush them together.
Add sour cream, vanilla extract, melted coconut oil or melted butter and beaten eggs to the mashed bananas. Mix until well combined.
Whisk together the flour, baking powder, salt, and sugar in a separate bowl.
Slowly pour the dry ingredients into the wet ingredients, stirring gently until mixed. Refrain from mixing too much.
Then, add the chocolate chips and gently mix them in.
Divide the batter evenly among 6 jumbo or 12 regular muffin cups, filling each about ¾ full.
Bake in the oven for about 25 minutes or until a toothpick inserted into the center comes clean.
Allow the muffins to cool in the muffin pan for a few minutes before transferring them to a wire rack to cool completely.
Enjoy your delicious and guilt-free Healthy Banana Blueberry Muffins!
Video
Notes
Tips for Choosing Ripe Bananas
Look at the color: The best bananas for baking are yellow with brown spots. Green bananas are not sweet enough yet, while very dark bananas are softer and perfect for mashing.
Give them a gentle squeeze: A ripe banana should feel soft but not mushy. If it still feels firm, let it sit on the counter for another day or two.
Check the smell: Ripe bananas have a naturally sweet smell, especially near the stem. That is usually a good sign they will add great flavor to your muffins.