Place two large spoonfuls of Nutella in a bowl and place in the freezer.
⅓-½ Cup Nutella
Set out the eggs and sour cream.
2 Large Eggs, 5 Tablespoons Sour Cream
Preheat the oven to 350 degrees F.
Spray a muffin tinwith nonstick spray or line with paper liners.
In a large bowl, whisk together the flour, cocoa, baking soda and salt. Set aside.
1 ⅔ Cups Flour, ⅓ Cup Cocoa, 1 teaspoon Baking Soda, ½ teaspoon Salt
In another bowl, whisk together the oil and sugar. Add in the eggs and sour cream and whisk again, but be sure to not over mix.
⅓ Cup Canola Oil, 1 Cup Sugar, 2 Large Eggs, 5 Tablespoons Sour Cream
Dump the dry ingredients, banana and chocolate chips on the wet ingredients and switching to a rubber spatula or wooden spoon, gently fold the ingredients together just until a few streaks of flour remain.
1 ⅓ Cups Mashed Banana, ⅔ Cup Mini Chocolate Chips
Scoop one large spoonful (we actually use a cookie scoop) into the bottom of the muffin wells and place a dollop of the frozen Nutella in the batter. Cover with batter up to ⅔ high in the cup.
Place a little Nutella on top of the batter and using a small knife, starting at the outside edge of the batter, swirl through and around the Nutella.
Allow to rest in the pan for 8-12 minutes before baking.
Bake at 350℉ for 12-16 minutes. The muffins are done when lightly golden and the middle springs back up when you touch the top.
Once the muffins are done, open the oven door, turn off the oven and let the muffins rest for 2 minutes, no longer, before carefully setting it on the counter for a few more minutes to cool.