Unsalted Margarine (Best Option)
1:1 by volume (e.g., 1 cup margarine per 1 cup butter)Unsalted margarine is formulated to replicate butter’s fat content and consistency, making it an excellent substitute in sugar cookies. The fat enables proper creaming with sugar, which is crucial for the cookie’s tender crumb and slight rise. Margarine’s water content is comparable to butter’s, maintaining dough hydration and spread.
To ensure success, use unsalted margarine to control salt levels and chill the dough if it feels too soft, as margarine can sometimes be softer at room temperature. Avoid margarine with added flavors or trans fats for best results.
The final cookies will have a texture and mouthfeel very similar to those made with butter, with only a subtle difference in flavor that is generally imperceptible in sugar cookies.