1. Preheat oven to 350°F (175°C) and line a 9×5-inch loaf pan with parchment paper.

2. Mash bananas in a large bowl until smooth.

3. Whisk in oil, granulated sugar, and brown sugar until combined.

4. Add eggs one at a time, mixing well, then stir in vanilla extract.

5. In a separate bowl, whisk flour, baking soda, baking powder, salt, and cinnamon.

6. Fold dry ingredients into wet ingredients gently until just combined.

7. Warm Biscoff slightly and mix with milk if needed for a smooth texture.

8. Pour half the batter into the pan, add Biscoff dollops, then remaining batter and more Biscoff.

9. Swirl gently with a knife to create ribbons.

10. Add banana slices and extra Biscoff drizzle on top if desired.

11. Bake for 55–65 minutes until a toothpick comes out clean.

12. Cool before slicing and serving.