Pour heavy cream into pot. Place the pot on high-heat and heat the cream until it is warm (but not boiling). Remove the pot off the burner and mix in ¼ cup Biscoff Spread. Mix until smooth.
Pour into individual fondue servings or one small pot. Serve with bananas, strawberries, and marshmallows.
Notes
Keep in mind this isn't a super smooth fondue - it's more like a thick caramel!