orange peel

Orange peel is the thick, colored outer skin of the sweet orange (Citrus × sinensis), a hybrid citrus fruit believed to have originated in Southeast Asia and later cultivated throughout Mediterranean regions and subtropical zones worldwide. The peel consists of the outer flavedo (pigmented layer) and the inner white pith (albedo), both of which contain essential oils, pectin, and volatile compounds responsible for the fruit's characteristic aromatic profile. The peel varies in thickness, oil content, and bitterness depending on the orange variety—Valencia oranges yield thinner, more delicate peels, while Seville and blood oranges produce thicker peels with more pronounced bitter and floral notes. Fresh peel has a vibrant orange or deep red hue and releases fragrant oils when scratched or pressed.

Orange peel is valued in both savory and sweet applications for its aromatic essential oils, bright citrus flavor, and subtle bitterness. In Western baking and pastry, candied or zested peel flavors cakes, cookies, chocolates, marmalades, and liqueurs such as Curaçao and Grand Marnier. In Asian cuisines, dried orange peel—particularly from Seville oranges (called chen pi in Chinese herbalism)—features in braised dishes, soups, and spice blends, imparting both depth and digestive properties. The fresh zest (outer colored layer) is grated over dishes, incorporated into marinades, and infused into syrups and oils. The whole peel is used for extracting oils, making bitter orange extracts, and creating aromatic infusions in both culinary and medicinal traditions.