Portion the Biscoff spread, and freeze for at least an hour (can easily be left over night).
Add the butter and sugar to a bowl and beat until creamy - I use my stand mixer with the beater attachment,
Add in the egg, and beat again. If using the vanilla, add it in now as well!
Add in the plain flour, cocoa powder, baking powder, bicarbonate of soda, and salt and beat until a cookie dough is formed!
Add in the chocolate chips and chopped biscoff biscuits and mix until they're distributed well!
Weigh the cookies out into eight cookies - they're about 120g each!
Carefully flatten each cookie ball and add a frozen lump of biscoff into the middle.
Make sure to wrap the cookie dough around the frozen biscoff well.
Once they're rolled into balls, put your cookie dough in the freezer for at least 30 minutes, or in the fridge for an hour or so!
Whilst the cookie dough is chilling, preheat your oven to 180C Fan, or 200C regular! If your oven runs hot, go for 160C-170c.
Take your cookies out of the freezer/fridge and put onto a lined baking tray. I put four cookies per tray!
Bake the cookies in the oven for 11-13 minutes. I don't personally flatten the cookies, as they flatten enough during baking (especially because of the biscoff in the middle)
Once baked, leave them to cool on the tray for at least 30 minutes, as they will continue to bake whilst cooling!
ENJOY!
Notes
These are best eaten on the day of baking, but can be revived by microwaving for 15-30 seconds, or putting into a hot oven for 2-3 minutes!
You can freeze the raw cookie dough easily, and bake from frozen if you don't want to bake the entire batch! Freeze with the frozen biscoff inside.