cup: button onions
Button onions contain quercetin and other antioxidants, along with inulin (a prebiotic fiber); they are low in calories and provide modest amounts of vitamin C and potassium.
About
Button onions (also called pearl onions or small pickling onions) are diminutive bulb vegetables belonging to the genus Allium, the same family as garlic, leeks, and shallots. These marble-sized onions are typically 1 to 1.5 inches in diameter and are harvested before reaching full maturity. They possess thin, papery yellow, white, or reddish skin and firm, layered white flesh with a pungent, sweet onion flavor that is less assertive than larger onion varieties. Button onions are often sold fresh, though they are also common in pickled or canned preparations for long-term storage.
The most common varieties include yellow button onions (the sweetest) and white button onions (with a sharper bite). Red or pearl onions offer a slightly different flavor profile with more delicate sweetness. Their small size, uniform shape, and tender texture when cooked make them distinct from standard onions, though they are essentially the same species at a different growth stage.
Culinary Uses
Button onions are prized in European cuisines, particularly French and British cooking, where they are traditionally braised whole or blanched and glazed as an elegant vegetable accompaniment to roasted meats and stews. They feature prominently in French bourguignon and other braises where their small size allows them to absorb cooking liquids while maintaining structural integrity. Pickled button onions serve as condiments in charcuterie boards, cocktails, and relishes. Asian cuisines also employ them in stir-fries and quick-braised preparations. Because they remain intact when cooked, button onions work well in any preparation where whole vegetables are desired—gratins, grain bowls, or alongside roasted vegetables.