8Biscoff cookies - broken into pieces - plus more for topping
Preheat oven to 350°F. Grease a 9x9 baking pan and line with parchment paper for easy removal of the blondies.
In a large bowl, whisk together brown sugar and melted butter.
Whisk in eggs, one at a time, then cookie butter and vanilla. Whisk until well combined.
Sift in flour and salt and fold with a rubber spatula until just combined.
Fold in white chocolate chunks and broken Biscoff cookies.
Spread mixture in prepared pan and bake in preheated oven for 28-30 minutes, or until a toothpick in the center of the pan comes out mostly clean. Allow to cool in pan for at least 10 minutes before removing from pan and cooling completely on a wire rack.
If desired, drizzle cooled blondies with melted cookie butter and crumbled Biscoff cookies.
Butter: I've tried this Biscoff blondies recipe with melted butter and with browned butter, and I love it both ways! If you're using unsalted butter, increase salt to ½ teaspoon.