What Is a Kumquat, and What Are Its Characteristics?

The kumquat is one of the smallest members of the citrus family. Although its shape resembles a lemon, its color is orange, and it is no larger than a walnut. Unlike other citrus fruits, its peel is sweet while its flesh is tart, so it is eaten whole, without peeling. Kumquats are rich in nutrients, including vitamin C. Here is how to select and use them in the kitchen.

How are kumquats used in cooking? Kumquats stand out among citrus fruits for their high vitamin C content. To use the peel, wash the fruit first, then slice it and add it to a recipe. Kumquats can be sliced with the peel on and used in jams, marmalades, and drinks; their tart flavor is noticeable in a dish. Their orange peel and tart aroma add a distinct layer of flavor to fruit sauces. The peel and juice can be used together in jams and drinks, with the amount adjusted to taste.

How do you choose and store kumquats? Look for glossy orange skin that is firm and free of blemishes. A fresh kumquat should feel slightly firm and heavy in your hand. Kumquats with dried, wrinkled, or soft, sunken skin have lost freshness. They last a few days at room temperature and stay fresh for up to two weeks in the refrigerator’s crisper drawer. Store them in a perforated bag or an open container to prevent moisture buildup and mold. For longer storage, slice kumquats, simmer them in sugar syrup until jam-like, and freeze them.

How else can kumquats be used in the kitchen? Kumquats can be eaten raw, peel and all, or sliced thinly and added to salads; the sweet peel and tart flesh create a pleasant contrast. Halve them and remove the seeds before using them as a garnish for desserts, cakes, and tarts. Kumquats are often used to make jam and marmalade. Their natural pectin helps them thicken without added pectin. Dried kumquat slices can be added to granola and cake batter. Their mildly bitter-sweet flavor also works well in sauces served with meats such as chicken and duck.

How do you grow kumquats at home? Kumquats can be grown in pots at home because the plant can remain evergreen year-round. During summer, water it at least twice a week; in winter, once a week is enough. Adjust the watering frequency to the season. Use the same container and the same amount of water each time to keep watering consistent. Pour water directly onto the soil, not the leaves; this supports root growth and helps prevent moisture damage to the leaves.

How are kumquats different from other citrus fruits? Their most distinctive feature is their sweet peel and tart flesh, the reverse of the balance in oranges, mandarins, and lemons. That is why kumquats are eaten whole, without peeling or discarding the peel. Size is another difference: a kumquat is slightly larger than an olive but smaller than a walnut. Its contrasting appearance and flavor also make it a decorative addition to salads and dessert plates. Kumquats usually have fewer seeds than other citrus fruits, and removing the seeds before eating is recommended.