Margarine (Best Option)
1:1 by volumeMargarine is formulated to imitate butter's fat content and melting profile, which is critical in doughnuts for achieving the right dough elasticity and frying performance. The fat coats flour proteins, limiting gluten development and ensuring a tender crumb.
When substituting, use margarine with at least 80% fat content and avoid low-fat versions. Keep margarine cold before mixing to maintain dough consistency.
Doughnuts made with margarine will have a slightly different flavor profile, often less rich, but the texture and frying behavior remain very close to butter-based doughnuts.