1½cups(187.5g)all-purpose flourweighed in grams or spooned and leveled
¾teaspoonbaking soda
½teaspoonsalt
½teaspoonground cinnamon
½cup(150g)Nutella®or other chocolate hazelnut spread
Instructions
Preheat oven to 400°F and fill a muffin pan with liners.
Mash the overripe bananas using an electric mixer, fork, or potato masher.
In a large bowl, whisk together the melted butter and sugar. Stir in the egg, vanilla extract, sour cream, and mashed bananas.
In a medium bowl, whisk together the flour, baking soda, salt, and cinnamon.
Gently fold the dry ingredients into the wet ingredients just until the flour streaks disappear.
Fill each muffin liner halfway with batter. Swirl 1-2 teaspoons of Nutella on top of the batter. Evenly distribute the remaining batter and swirl another 1-2 teaspoons of Nutella on top.
Bake muffins at 400°F for 5 minutes. Then, reduce the temperature to 350°F and continue to bake until a toothpick comes out clean (15-20 more minutes; about 20-25 minutes total).
Let muffins cool in the pan for 10 minutes, then transfer to a wire rack.
Notes
Storage: Store cooled muffins in an airtight container at room temperature for 5 days or in the freezer for 3 months.Jumbo Muffins: Bake at 425°F for 5 minutes then reduce temperature to 375°F and bake until a toothpick comes out clean (about 20-25 minutes total).Mini Muffins: Bake mini muffins at 350°F for 10-15 minutes.Nutrition: The provided nutrition information is an estimate, the calorie accuracy is not guaranteed.