Banana Bread Nutella Muffins

Steps

1. Preheat oven to 160°C (325°F). Line a 12-hole muffin tin with paper cases.
2. In a large bowl, combine mashed banana, oil, and eggs.
3. Add the banana bread cake mix and stir until combined.
4. Divide the batter evenly among the muffin cases.
5. Top each muffin with 1 tablespoon of Nutella and swirl it into the batter with a butter knife.
6. Bake for 35 minutes, or until a skewer inserted comes out clean.
7. Cool in the tin for 5 minutes, then transfer to a wire rack to cool completely.