
Double cream (UK) or heavy cream (US) is the richest liquid dairy cream, at least 36% milkfat in the US or 48% in the UK.
Clean, mildly sweet dairy flavor with thick, coating richness rather than any distinct taste.
Used as an enricher: a small splash smooths and adds opaque body to a shaken drink, while a larger measure builds a dessert-like texture, as in a Brandy Alexander. Its high fat content whips to stable peaks for floating or layering and won't split in hot or acidic drinks, but hard shaking can churn it toward butter, so add it last and shake briefly. Thin it with a little milk if you want a lighter body closer to single cream.
Single cream or half-and-half works for a light enriching splash, though the drink will be thinner and won't whip or float as well. If the recipe needs real body or stable whipped peaks, nothing but a high-fat cream delivers that; stir in a little melted butter as a last resort.
Double/heavy cream is high-fat (heavy cream ≥36% US; double cream ≥48% UK); single cream (≥18% UK) and half-and-half are lower fat and will not whip into stable peaks.
Whipping cream sits at a lower fat band (UK ≥35%; US ~30–36%) than double cream (≥48%); double cream is markedly thicker and more resistant to splitting in hot liquids.
Highly perishable — keep refrigerated and use before the date on the carton, as it sours and separates quickly once opened.