Mixed peel is another word for candied citrus peel, usually made from lemons and oranges, and is commonly found as an ingredient in British baking for Christmas cake, hot cross buns, and Dundee cake. u003cbr/u003eu003cbr/u003eHistorically, it was made to preserve the citrus peels, giving them a longer shelf life and eliminating waste. The citrus peel is blanched, steeped, and cooked in a sugar syrup until the sugar replaces the moisture in the peel. It is then dried out and tossed in sugar.