Creaming butter and sugar: incorporating air

Useful to know

Creaming butter and sugar incorporates small air bubbles with the help of the sugar crystals. King Arthur describes a well-creamed mixture as lighter and fluffy, while an excessively warm mixture can become greasy and grainy. [1]

Watch the texture rather than relying only on mixer time. Butter that holds its shape but yields to pressure behaves differently from liquid fat. When a recipe begins with creaming, replacing softened butter with melted butter changes the mechanism that builds the structure, not merely the convenience of mixing.