The zest (the outermost part of the rind). On a lemon, zest is the yellow part of the peel (skin) on the outside of a lemon. The zest is shiny, brightly colored, and textured; it is the outer surface of the fruit which consumers can directly see.

Is lemon zest the same as lemon peel?

Technically the zest of any citrus fruit is the thin, colored outer layer of the skin. The rind includes the zest and a bit of the bitter white underlayer, whereas the peel is the whole jacket — everything but the flesh. Zest contains the flavorful citrus oils and is the most widely useful of the three.

What can I substitute for lemon zest?