Start by preheating your oven to 350℉ (175C/155C Fan) and preparing you pan. I like to grease and flour this, but you can line your pan with parchment paper or use a trusted non-stick cooking spray if preferred.
In a large mixing bowl, cream together the butter and sugar for about 2 minutes.
5 tablespoon unsalted butter, ⅔ cup granulated sugar
Then add the egg and yolk, beating to combine.
1 large egg, 1 egg yolk
Next add the bananas, broken into chunks, beating these into the mixture until combined.
2 medium sized bananas
Next sift the flour, baking soda, cinnamon, ginger and nutmeg into the mixing bowl and use a spatula to stir until just combined. Be sure to scrape the bottom of the bowl to make sure there are no unmixed patches of dry ingredients.
1⅓ cup all purpose flour, ½ teaspoon baking soda, ½ teaspoon ground cinnamon, ½ teaspoon ground ginger, ¼ teaspoon ground nutmeg
Add the chocolate chips and stir to distribute.
6 oz milk chocolate chips
Pour about half or two thirds of the batter into the prepared baking pan.
Dollop out about half of your Biscoff spread over the batter.
8 oz Biscoff spread
Pour the remaining batter on top of the Biscoff and then finish off with dolloping the remaining Biscoff on the top.
8 oz Biscoff spread
Using a kitchen knife or skewer, swirl the Biscoff into the batter.
If decorating with the banana on top, carefully slice this in half lengthwise and place with the cut side facing up on top of the batter.
1 medium banana
Bake in the centre of the preheated oven for about an hour and 15 minutes, until a toothpick inserted in the centre comes out clean of crumbs.
Let cool for about 10 minutes in pan and then turn out onto a wire rack to cool completely.