Definition: When a baking recipe instructs you to “cream together,” it is referring to when solid fat is beaten together with sugar. The process of beating the two together forms a web of air between the fat and sugar, which lightens and leavens baked goods.
When It’s Used: When making cookies, buttercream frosting, and butter-based cakes.
Tips for Creaming: Butter needs to be at a cool room temperature (around 68–72°F/20–22°C) to be properly creamed with sugar. If it is too cold or too warm, the mixture will separate and will not hold the web of air.