All you need is a fine grater and a light hand. Rinse and dry the lemon, rub it over a rasp or the finest holes of a box grater, turn it as each patch goes pale, and stop when white pith shows. An average lemon yields about 1 tablespoon of zest. Always zest before you juice.
The order is the one The Pioneer Woman's guide gives: wash and zest the fruit first, then cut and juice it. Even when a recipe only wants juice, Taste of Home suggests zesting the peel into a container for later. Its tablespoon-per-lemon figure is worth remembering when a recipe asks for "the zest of 2 lemons" and you're holding one.
Zest, peel and pith are different layers
Zest is only the colored outer skin. Scientists call that layer the flavedo, and in a lemon it's 1–3 mm thick and packed with oil glands. A 2026 review of lemon composition in the journal Foods puts essential oil at 2.0–4.5% of the flavedo's dry weight, with D-limonene making up 60–76% of the volatile compounds. That oil carries the lemon's scent. That's why, pound for pound, the outer peel carries more flavor than the juice (Taste of Home).
Pith is the white, spongy layer underneath, the albedo. It has almost none of that oil (under 0.5%, per the same review) but a great deal of pectin, 18–28% of its dry weight. When a recipe says "peel," it usually means both layers.
Cooks keep the pith out of zest because it tastes bitter and adds nothing a zest recipe wants.
How to zest a lemon with a rasp grater
- Rinse the lemon under plain running water, rubbing it as you go. The FDA advises rinsing produce before you peel or cut it and says soap or produce wash isn't needed.
- Dry it well, so the zest doesn't clump.
- Hold the lemon in one hand over a bowl or board and run the rasp, teeth down, over it; the zest gathers in the rasp's curved back.
- Use light strokes, letting the teeth skim the surface.
- Rotate the lemon a little after each stroke, moving on as soon as a patch turns pale.
- Tap the rasp on the bowl, or wipe the back with a finger, to collect every bit.
Light pressure is the point. The flavedo is only a few millimeters deep, and a heavy hand takes the teeth straight into the pith.
Can you zest a lemon without a Microplane?
Yes. The finest holes of a box grater do the job, turning the fruit the same way, though zest sticks in the holes and is harder to collect (Delish). With a vegetable peeler or a paring knife you take the zest off in strips, then mince it as fine as the recipe needs. For drinks, a channel knife (sometimes sold as a lemon zester) cuts thin curls or one long spiral.
The rasp itself began as a woodworking tool; a Canadian home cook first tried one on an orange in 1994, Microplane says.
When should you use the peel instead of zest?
Use strips of peel when you want the lemon's oil in a liquid without bits of zest left in it. A strip steeped in syrup, cream, a braise or a warm drink gives up its flavor and can be fished out. Liquor.com's classic hot toddy works this way: a clove-studded piece of lemon rind goes into the mug and flavors the drink. A strip is also what you twist over a cocktail to spray oil across the surface.
Use the whole peel, pith included, when the pith has a job to do. Marmalade and candied peel are the two big examples. The Foods review describes the albedo as porous and quick to hold water, and its pectin is the high-methoxyl type suited to forming gels in acidic conditions. A pot of lemon and sugar is exactly that condition, so in marmalade the pith helps the set.
Take our Eureka Lemon Marmalade: its three ingredients are Eureka lemons, water and cane sugar, and there's no added pectin. The lemons come from our Redlands grove, first planted in 1897. For how growing and picking decide what the peel brings to a jar, see our note on how the grove shapes a marmalade. The marmalade collection has the rest of the range.
How long does lemon zest keep?
About a week in an airtight container in the fridge, and much longer frozen. Estimates for the freezer run from 3 months (Delish) to a year (Taste of Home); for the brightest flavor, go with the shorter figure. Freeze it in teaspoon portions so you aren't chipping at a frozen block, and stir it straight into batter without thawing.
Photo by Stephanie Sarlos on Unsplash.
