These muffins are a delightful treat, perfect for any time of the day. Customize them with your favorite mix-ins for a unique twist.
Preheat your oven to 400°F (200°C) and line a 12-cup muffin tin with paper liners.
Preheating ensures even baking from the start.
In a large mixing bowl, combine the flour, sugar, baking powder, baking soda, and salt.
Sifting the dry ingredients can help avoid lumps.
In another bowl, whisk together the melted butter, sour cream, egg, and vanilla extract until smooth.
Ensure the butter is not too hot to prevent cooking the egg.
Gently fold the wet ingredients into the dry ingredients until just combined.
Overmixing can make the muffins dense.
Fold in the blueberries, mashed banana, and chocolate chips.
Distribute the mix-ins evenly for consistent flavor.
Divide the batter evenly among the muffin cups.
Using an ice cream scoop can help portion the batter evenly.
Bake in the preheated oven for about 20 minutes, or until a toothpick inserted into the center comes out clean.
Rotate the pan halfway through baking for even cooking.
Let the muffins cool in the tin for 5 minutes, then transfer to a wire rack to cool completely.
Cooling on a wire rack prevents soggy bottoms.