In a large cup, add 1.5-2 tablespoons of Macadamia Nut Syrup, 12-16 ounces of cold brew, and ice, leaving room for the cold foam, and set aside.
In a separate smaller cup, combine: 1/2 tablespoon Vanilla Syrup, 1/2 tablespoon Macadamia Nut Syrup, 1/2 tablespoon White Chocolate Sauce, 2 tablespoons 2% milk and 3 tablespoons heavy whipping cream.
Use a handheld milk frother to froth the mixture for 30-60 seconds or until it becomes thick and creamy.
Pour the cold foam over the prepared cold brew, and top with crushed Biscoff Cookie crumbles.