Preheat the oven to 180C/350F/Gas 4, and line a baking tray with parchment paper or a silicone mat. Set aside.
In a large mixing bowl, mix together the Biscoff spread, egg, and flour until completely combined.
Using a small cookie scoop (about 1oz per ball), scoop the dough onto the prepared baking tray.
Dip a fork in sugar, and lightly flatten each cookie, making a criss-cross pattern.
Bake for 10 - 12 minutes.
Allow to cool for 10 minutes on the tray before transferring them to a wire rack to cool completely.
Video
Notes
Cookies stay fresh, kept in an airtight container, at room temperature for up to 1 week.Cookie dough balls can be kept in the fridge for up to 5 days, or frozen for up to 3 months.