Cold foam is a fun, airy whipped milk that sits at the very top of your cold brew, and is perfect for adding a touch of coffee house flair. Its creamy, yet airy texture wins points for those who like their coffee not-quite-black, but don't want to add heavy cream or creamers. There is also sweet cream cold foam, which combines heavy cream and the cold form portion so the coffee is creamy, sweet, and has a fluffy layer of foam on top.