Add the heavy cream and Biscoff spread to a large mixing bowl.
Using a hand mixer or stand mixer, whip the mixture until smooth and medium peaks form.
Be careful not to overmix, as the mousse can separate if whipped too long.
Spoon the mousse into a large serving bowl or divide it among individual dessert glasses.
Refrigerate for at least 30 minutes until chilled and set.
Before serving, drizzle with additional Biscoff spread.
Garnish with crushed or whole Biscoff cookies if desired.
Serve chilled and enjoy this creamy Biscoff Mousse Recipe.