Line an 8 x 8 inch baking pan with baking paper and pre-heat oven to 180C/350F.

Melt the butter in a large bowl in the microwave. Let it cool for a few minutes.

Whisk in the brown sugar. Then whisk in the eggs and vanilla. Finally, stir in half a cup of the Biscoff spread.

Mix in the salt, flour, and baking powder until just combined. Don?t over-mix.

Gently fold through the chocolate.

Tip the mixture into the baking pan. Smooth down and into the corners with a spatula.

Warm the rest of the Biscoff spread in a small bowl in the microwave. Drizzle it over the top of the batter in the pan.

Press the broken Biscoff biscuits into the top, and press a few extra chocolate chunks into the top.

Bake for 20 minutes or until the blondies have started to pull away from the edges and the top is set and looks crinkly. A skewer plunged into the center can come out with sticky bits but not raw batter.

Serve warm as a dessert or allow to cool, then slice into 16 squares.