To the blender jar add milk, ice cubes, Biscoff spread and 4 scoops of ice cream.
Blend till smooth. Warm some extra Biscoff spread in the microwave till it melts.
Drizzle this melted spread on the inner side of the glasses.
With a butter knife, take the regular (not melted) spread and put it all round the top outer edges of the glasses.
Crush some Biscoff cookies and press them to the top edges.
Add 1 scoop of ice cream to each glass. Pour the milkshake. Top with whipped cream. Drizzle the melted Biscoff spread. Add insert half a cookie on top.Serve cold and enjoy!