Crush up the Biscoff biscuits in a pestle and mortar.

Gently spread a small amount of the Biscoff spread around the rim of your glass and rub it in the biscuit crumbs.

In a cocktail shaker, add the ice, vodka, Frangelico, Kahlúa, espresso, and the Biscoff spread.

Shake for a minute and a half or until a frost forms on the shaker.

Double-strain the mix into your Biscoff-rimmed glass.