Use equal parts instant coffee, sugar, and hot water for a stable fluffy topping. Whip until glossy soft peaks form; under-whipping produces a thin foam, while excessive whipping creates a stiff, dry texture. For a softer drink, use less ice and whole milk. For a lighter version, use oat, almond, or low-fat milk. Customize with cinnamon, vanilla, caramel, chocolate syrup, orange zest, or a pinch of sea salt. Assemble immediately before serving because the foam gradually loses volume. Refrigerate leftover whipped coffee in a sealed container for up to 24 hours and whisk briefly before using. Do not freeze the finished drink because the milk and whipped coffee can separate.
Keyword Bristle Cookie, Fluffy Iced Coffee, Ice Cream Cookie, Spanish Iced Fluffy Coffee, Spanish Whipped Coffee