01 -
Scoop 15 large teaspoons of Biscoff spread onto parchment-lined trays and freeze for at least 60 minutes until firm.
02 -
Beat the softened butter with brown sugar using an electric mixer on medium speed until pale and fluffy, approximately 3 minutes.
03 -
Add vanilla extract and the room-temperature egg to the creamed mixture and beat until fully combined and smooth.
04 -
Whisk together all-purpose flour, Dutch-process cocoa powder, cornflour, baking soda, and sea salt in a separate bowl.
05 -
Fold the dry ingredients into the wet mixture gently, creating a thick, even cookie dough.
06 -
Stir in the finely chopped white chocolate evenly throughout the dough for consistent creamy bursts.
07 -
Use a cookie scoop to portion uniform balls of dough, working swiftly to keep dough cool.
08 -
Flatten each dough ball slightly, place a frozen Biscoff scoop in the center, then wrap and seal the dough around the filling. Roll back into a smooth ball shape.
09 -
Place cookies on parchment-lined baking trays spaced evenly, no more than six per tray to allow spreading.
10 -
Bake at 375°F (190°C) conventional or 340°F (170°C) fan-forced for 11 to 13 minutes until edges are set but centers remain soft and gooey.
11 -
Allow cookies to rest on trays for 5 minutes before transferring. Serve warm for gooey centers or reheat gently to restore meltiness.