Sour cream is cream cultured with lactic-acid bacteria, which thicken the cream and create its characteristic tangy flavour. Fat content varies by market and product; in Canada, common sour cream products are often around 14% or higher, but the label should be checked. Reduced-fat and light versions behave differently in cooking.
Culturing produces lactic acid, which gives sour cream its characteristic acidity and thickened texture. The fat percentage, culture, stabilisers and processing method affect its consistency and cooking performance. Sour cream is generally thicker and tangier than ordinary cream, but it is not the same product as crème fraîche.
Sour cream is used in dips, dressings, baked goods, sauces and as a garnish for soups and savoury dishes. It can separate or curdle when boiled or exposed to high heat, especially in lower-fat versions. Temper it and add it toward the end of cooking over gentle heat when a smooth result is required. In baking, its acidity and moisture can contribute to tenderness and a moist crumb.
Example: fold sour cream into a warm sauce off the heat, use it in a dressing for baked potatoes, or incorporate it into a coffee cake batter.
Crème fraîche is generally higher in fat and more resistant to curdling during cooking. Sour cream has a sharper tang and may be thinner, depending on the product. They can sometimes be substituted, but the result may differ in richness, acidity and stability.
Chef’s tip: avoid boiling sour cream. If adding it to a hot preparation, temper it with a little warm liquid first and incorporate it gently. Check the product’s fat percentage when consistency is important.
This term is one of hundreds covered in depth across OCS courses, learning paths, and 1-on-1 coaching with Chef Eric.
