onion purée
Onion purée retains the antioxidants and sulfur compounds characteristic of fresh onions, including quercetin and organosulfurs with potential anti-inflammatory properties. Cooking concentrates the sugars and umami compounds while reducing volume.
About
Onion purée is a smooth paste produced by cooking onions until softened and then processing them into a fine, homogeneous consistency. Created from the bulbs of *Allium cepa*, a member of the Amaryllidaceae family, this preparation represents a concentrated form of onion that intensifies the ingredient's characteristic sharp, sulfurous notes while developing deeper, caramelized sweetness through the cooking process. The purée can range from pale golden to deep brown depending on cooking duration and temperature, with longer cooking producing sweeter, more umami-forward results.
Culinary Uses
Onion purée functions as a foundational flavoring agent in French classical cuisine, where it is incorporated into mother sauces, stocks, and mirepoix preparations as a concentrated base. It is widely employed in sauces (béarnaise, bordelaise), soups, stews, and braises to build depth and roundness of flavor without introducing bulk. The purée is also used in professional kitchens as a binding and thickening agent, and in cuisine moderne as a component of vegetable-based sauces and garnishes. Its concentrated nature allows precise flavor dosing in compound butters, marinades, and contemporary plates where visual restraint is desired.