Preheat the oven to 350F then line a large baking sheet and set aside.
In a large bowl cream the butter, cookie butter, brown sugar, and granulated sugar. Add in the egg and vanilla extract and mix again.
Mix in the flour, corn starch, baking soda, and salt.
Scoop cookie dough balls (⅛ cup worth of cookie dough). Place on the prepared baking sheet and bake for 10 minutes.
Allow the cookies to cool down and drizzle with melted cookie butter and a sprinkle of Biscoff cookie crumbs.
