The peel of citrus fruits is bitter and generally not eaten raw, but is used in cooking. The outermost, coloured part of the peel is called the zest, which can be scraped off and used for its tangy flavour. The fleshy white part of the peel is bitter when raw, but becomes sweet when candied, a process involving boiling with sugar.
Candied citrus peel is often coated in chocolate and eaten as confectionery. Orange and lemon peel can be candied and mixed together for use in such recipes as plum pudding, florentines, and fruitcake.