- Availability: Common
Cold foam is made without heat, typically by blending non-fat milk at high speed until it triples in volume and holds its shape, then spooned or poured over an iced drink so it sits as a distinct white layer rather than melting in. It became a fixture of American coffee menus after Starbucks popularized it in 2018, and Brooklyn specialty shops have adapted the technique with higher-quality milks and oat-milk alternatives. The textural contrast (cold, slightly aerated foam over ice) is the appeal; expect the foam layer to last a few minutes before folding into the drink below.