Sweat / Suer

Sweating is the technique of cooking cut vegetables or aromatics in a small amount of fat — butter, oil, or rendered lard — over gentle heat, typically covered, so they exude their own moisture and steam in that liquid. The goal is to achieve structural collapse and flavor-releasing softness without the Maillard browning that defines sautéing. Onions sweated properly turn translucent and silky rather than golden; their sharp pungency converts to mellow sweetness as cellular water carries off sulfur compounds. A classic mirepoix for a fond blanc is always sweated, never colored. The French verb suer (literally 'to sweat') appears in classical brigade terminology to distinguish this gentle approach from faire revenir (to brown). In practice, sweating requires a fitted lid or parchment cartouche to trap steam, a low flame, occasional stirring, and patience — typically 8–15 minutes for diced onion, longer for dense vegetables like fennel or leek. Raising the heat even briefly risks caramelization and an unwanted flavor shift.

“Sweat the diced onion, celery, and carrot in butter over medium-low heat for ten minutes until the onion is completely translucent before adding the stock.”

• TechniqueMirepoix
• TechniqueSauté
• ConceptMaillard Reaction

1. 1.Jacques Pépin — La Technique (1976)
2. 2.The Culinary Institute of America — The Professional Chef, 9th ed. (2011)
3. 3.Auguste Escoffier — Le Guide Culinaire (1903)
4. 4.Harold McGee — On Food and Cooking (2004)

Confidence: high