With an electric hand mixer whip room temperature butter with sugar for a few minutes Mix in the egg, just until combined, then mix in the Biscoff spread and vanilla extract just until fully incorporated
Sift flour, salt, baking soda and cinnamon together then add the flour mixture into the wet ingredients and fold with the help of a Rubber spatula just until combined. Do not overmix Fold in chocolate chips and Biscoff cookie chunks
Prepare 2 baking pans with parchment paper
Divide the dough into 10 equal balls (using a Digital scale is handy) and place them onto the parchment paper leaving enough space between them to spread. I recommend baking 5 cookies at once Do not soften the surface of the balls, in fact try to keep it as rough as possible for a nice, crackly surface
Let cookie dough rest in the fridge for an hour
Pre-heat oven to 175 C / 347°F ( no fan)
After 1h chilling time, bake the cookies for 15 minutes in the following way: Bake for 10 minutes then place some larger biscoff cookie chunks on top, then bake them for further 5 minutes.
If the cookies are not spreading enough, bang the baking tray to the kitchen counter a few times (carefully).
For perfectly round cookies, grab a large cookie cutter (it needs to be slightly larger than the cookies). Place it on your cookies and make circular motions several times. It will slightly tighten the baked cookie dough so it can have a better shape.
Let the cookies rest for a few minutes, then carefully remove them from the baking sheet and let them cool on a Cooling rack. Serve them while they are slightly warm
The Cookies will further set as they cool. Store them on room temp for a few days in air tight jar