Step 1

Prepare: Preheat oven to 425 degrees F. Line a 12-cup muffin tin with paper liners or spray with nonstick cooking spray. Set aside

Step 2

In a large bowl, whisk together the flour, baking powder, salt and cinnamon.

Step 3

Set aside. In a separate large bowl, mix together with a wooden spoon the vegetable oil, brown sugar, eggs, milk and sour cream until well incorporated.

Step 4

Add in the mashed banana until well combined.

Step 5

Gently fold in the dry ingredient mixture until no dry spots of flour are left.

Step 6

Fill each cup of muffin tin about ¼ of the way with muffin batter.

Step 7

Place a teaspoon of dulce de leche on top of the batter.

Step 8

With a toothpick, gently swirl the dulce de leche into the muffin batter.

Step 9

Add more muffin batter on top until the muffins cups are ½ full.

Step 10

Place another teaspoon of dulce de leche on top and swirl around with a toothpick gently.

Step 11

Sprinkle tops with sparkling sugar.

Step 12

Bake for 5 minutes, then lower the oven temperature down to 350 degrees F for another 15 minutes, or until a toothpick inserted into the center of the center muffin comes out clean.

Step 13

Allow to cool in muffin tins for 10 minutes, then transfer to a wire rack to cool completely.