Corn
Fresh sweet corn is at peak sweetness right after harvest—the sugars start turning to starch immediately. Learn how to store, prep, and cook it right.
Storage
Keep corn in its husks and store in a plastic bag in the crisper drawer. The husks seal in moisture and slow sugar loss. Don't wash or shuck until you're ready to cook. Use within 1–2 days for peak sweetness. There's a piece of farm wisdom that goes 'put the water on to boil before you go pick the corn'—sweet corn's sugars start converting to starch the moment it's picked, so same-day is best.
Keeps For
1–2 days for peak sweetness; 3–4 days and still good but starchier. After a week it's more starch than sugar—edible, but use it in something cooked (chowder, cornbread, fritters) rather than eating it straight.
Flavor Profile
Farm-fresh sweet corn is intensely sweet with plump, juicy kernels that burst when you bite them. The flavor is bright and grassy with a milky richness. Modern varieties come in yellow, white, and bi-color, with 'super-sweet' (sh2) types holding more sugar longer than classic sweet corn (su). Older corn turns starchier and chewier—still fine for chowder or cornbread, less exciting off the cob. Field corn, popcorn, and dent corn are different species entirely; those are for grinding, popping, or feeding livestock, not for eating fresh.
How to Prep
Pull back the husks and silk just before cooking—the longer corn sits shucked, the more it dries out. To remove stubborn silks, rub the shucked cob with a damp paper towel or a clean dish brush. For cutting kernels off the cob, stand the cob upright in a bundt pan or a large bowl and slice down with a sharp knife; the kernels fall neatly into the bowl. For grilling in the husk, soak in water for 15 minutes first—the damp husk steams the kernels while the outside chars. For grilling naked, strip fully and oil lightly before hitting the grates.
Ways to Cook
- 1 Grill in husks for smoky, steamed perfection
- 2 Boil briefly in lightly salted water until just tender
- 3 Char on the grill and slather with mayo, cheese, and lime for elote
- 4 Cut kernels off the cob for salads and salsas
- 5 Add to soups and chowders
- 6 Make creamy corn pudding or corn bread
- 7 Roast kernels and add to grain bowls or tacos
- 8 Cut into corn 'ribs' and fry or roast until curled
Pairs Well With
Good to Know
A small worm at the tip (corn earworm) is totally normal for non-sprayed corn—slice that section off and the rest is fine. Mold or dark slimy patches on the kernels are different; compost those cobs. Husks that have yellowed or dried out signal older corn, though the kernels inside may still be usable.
Did You Know?
Modern corn descends from teosinte, a scraggly Mexican grass with a handful of hard kernels per ear. Indigenous farmers selectively bred it over thousands of years into the big sweet ears we know today—a transformation so dramatic that for a long time no one could identify the ancestor plant. Also worth knowing: the 'corn' in 'corned beef' doesn't mean corn the vegetable. In Old English, 'corn' meant any grain or small kernel, including the large salt crystals used to cure beef. That's why corned beef has nothing to do with corn.
Recipe Inspiration
Common Questions About Corn
How long does fresh corn last?
1–2 days for peak sweetness, 3–4 days and still good but a little starchier, and up to a week if you don't mind the sugar-to-starch shift. Store in the husk in a bag in the crisper drawer. If you can't get to it in time, cut kernels off the cob and freeze—frozen corn keeps its sweetness for months.
Should I refrigerate corn on the cob?
Yes. Fresh corn at room temperature loses sweetness fast—the sugars convert to starch more quickly at warm temps. Keep it in the husk, in a plastic bag in the crisper drawer, and use within a few days. This is one of the few vegetables where the warmth-vs-cold storage debate has a clear answer: cold.
Should I shuck corn before storing?
No—keep it in the husk until you're ready to cook. The husk seals in moisture and slows the sugars from converting to starch. Shucked corn dries out and loses sweetness faster, even wrapped up in the fridge. If you've already shucked and need to store it, wrap tightly in plastic and use within a day.
Can you freeze corn on the cob?
Yes, and it works well. Shuck and de-silk the cobs, blanch in boiling water for 4-6 minutes (depending on thickness), plunge into ice water, dry thoroughly, and freeze in freezer bags or vacuum-sealed pouches. Frozen whole-cob corn keeps 8-12 months. To cook, drop frozen cobs into boiling water and cook a few minutes longer than fresh. If you have more than a couple of freezer shelves to fill, cutting the kernels off the cob before freezing saves a huge amount of space and is faster to cook with.
How do you freeze corn off the cob?
Shuck, blanch the whole cobs for 4 minutes, cool in ice water, then cut the kernels off with a sharp knife (stand the cob in a bowl to catch the kernels). Dry slightly and pack into freezer bags, squeezing out air. Keeps 8-12 months. This is the way to go if you're putting up a lot of corn—much more freezer-efficient than whole cobs. Vacuum sealing is also a great option. Freezing the kernels in a thin layer on a baking sheet before bagging makes them easier to dose out for future use.
When is corn in season?
In the Pacific Northwest, sweet corn comes in from late July through early October, with peak quality in August. It's one of the most seasonal crops we grow—fresh-picked local corn in August is a different food than shipped corn in March. If you see corn at a farm stand in July, it's probably been warmed in a hoop house or trucked in from further south. True local peak is mid-to-late summer.
How do you know when corn is done?
For boiled corn, it's done when the kernels turn bright yellow (or brighter white for white varieties) and feel just firm to a poke—usually 3-5 minutes for fresh corn, 6-8 for older or frozen. Don't boil longer than that; kernels get chewy and lose sweetness. Grilled corn is done when the kernels are tender and have a few charred spots, about 10-15 minutes turning occasionally. The 'does it float?' test you'll see online is about corn tortillas and dough, not corn on the cob. If your corn is floating, it's probably overcooked.
Should I boil or grill corn?
Both work, and it comes down to what flavor you want. Boiled corn is the purest expression—clean sweet-corn flavor, quick, no smoke. Grilled corn (especially charred on open grates, not in the husk) adds smokiness and caramelization; it's the traditional base for elote. Grilling in the husk steams the kernels gently and picks up a mild smoke flavor without charring. Steaming is somewhere between boiling and in-husk grilling. If you want to taste the corn, boil or steam; if you want to taste the grill, char it.
Should I grill corn in the husk?
Depends on what you want. In the husk, the kernels steam inside while the outer leaves char—mild smoke flavor, tender kernels, minimal blackening on the corn itself. Out of the husk, the kernels char directly, giving you deep grilled flavor and those picture-perfect black spots. Both are good. For elote, go naked and let the char happen. For a less aggressive grill flavor, leave the husks on.
Should I soak corn before grilling?
Only if you're grilling in the husk—a 15-minute soak in water keeps the husk from igniting and helps the corn steam. If you're stripping the husks off and grilling the cobs bare, no soak needed; just oil them lightly and go. Soaking shucked corn doesn't do anything useful.
Should I add sugar to corn cooking water?
No. Fresh sweet corn has more than enough sugar on its own—adding more doesn't improve anything and can actually make the kernels tougher. Some old-school cookbooks recommended sugar because older varieties of sweet corn converted to starch so fast that late-season or trucked-in corn really did need a sugar boost. With modern super-sweet varieties, there's no reason to bother.
Should I salt corn cooking water?
Light salt is fine—salt seasons the kernels slightly as they cook. Heavy salt can toughen the kernels, so go light, especially with older corn. A teaspoon or two in a big pot of water is plenty. Don't boil corn in heavily salted pasta water.
Why doesn't corn digest?
The outer hull of each kernel is made of cellulose, which humans can't break down. The inner starchy part digests fine—it's just the tough yellow jacket that passes through intact, which is why you see whole kernels on the other end. Chewing thoroughly helps (you physically break the hull open), but even well-chewed corn tends to leave visible traces. This is normal and not a sign that anything's wrong.
Is there a worm in my corn?
If you find a small caterpillar at the tip of a cob, that's a corn earworm. It's the most common pest on organic or unsprayed sweet corn—they chew into the silk end and eat the kernels near the tip. Slice off the affected section (usually the top inch or two) and the rest of the cob is perfectly fine. Finding them is actually a good sign that the corn wasn't treated heavily with insecticides. Grocery-store corn rarely has them because it's been heavily sprayed or the tips have been trimmed at the packing plant.
Why are there brown tips on my corn?
Brown silks at the tip of a husk are normal—silks dry out after pollination, which is exactly what's supposed to happen. Brown or shriveled kernels at the tip can mean the corn is a little old, or that the tip kernels didn't get fully pollinated (common with organic corn, happens when the silks don't catch enough pollen). Slice off the tip inch; the rest is fine.
Why is my corn chewy or tough?
Usually one of three things: the corn is too old (sugars converted to starch, kernels firmed up), it's not actually sweet corn (field corn and dent corn are supposed to be chewy—they're for grinding, not eating), or you overcooked it. Fresh sweet corn cooks in 3-5 minutes; past that, the kernels tighten up and lose their snap.
Can you eat corn raw?
Yes, and with fresh sweet corn it's great. Cut kernels off the cob and toss them into salsas, salads, or grain bowls. The texture is crisp and the flavor is bright—sweeter than cooked corn in some ways. Skip this with older corn or any non-sweet varieties (field, dent, popcorn)—those need cooking to be edible.
Is corn a vegetable, fruit, or grain?
Technically all three. Sweet corn eaten fresh is treated as a vegetable. Botanically, a corn kernel is a fruit (specifically a caryopsis, the same category as wheat and rice). Once the kernels dry down on the stalk, they become a grain—that's how we get cornmeal, polenta, popcorn, and hominy. Same plant, different life stages.
What's the difference between sweet corn and popcorn?
Different varieties entirely. Sweet corn is bred for high sugar content and is eaten fresh, when the kernels are still soft and milky. Popcorn (and its relative, field corn) is bred to dry down hard on the stalk—the kernels have a thick, moisture-sealing hull that lets steam build up inside when heated, causing the characteristic pop. You can't pop sweet corn; the hulls aren't strong enough. And eating popcorn raw off the cob is unpleasant at best.
What did corn originally look like?
Nothing like what we eat now. Modern corn descends from teosinte, a Mexican grass with a handful of tiny, rock-hard kernels per ear. Indigenous farmers bred it up over 7,000+ years into the large, sweet-kerneled varieties we know. The transformation was so extreme that for decades botanists couldn't figure out what wild plant corn had come from—teosinte and corn don't look related at a glance. Sweet corn specifically is much newer; it's a relatively recent selection for higher sugar content.
What does 'corned' mean in corned beef?
Nothing to do with the vegetable. In Old English, 'corn' meant any grain or small kernel—including the large salt crystals used to cure meat. 'Corned beef' is beef cured in big salt kernels. The name stuck even after 'corn' came to mean the specific vegetable in American English. So: corned beef has no corn in it.
What are corn ribs?
Corn on the cob cut lengthwise into quarters or sixths. When fried or roasted, the strips curl slightly and the kernels stay attached to the cob core—so you can pick them up and eat them like ribs. It's a great format for seasoning because the exposed kernel surface takes spice rubs and sauces well. Great with chili-lime seasoning or cajun spice. Needs a sharp heavy knife and a steady hand to cut safely.
Why don't my corn kernels pop?
If you're trying to pop sweet corn, it's because sweet corn can't be popped. Popcorn is a specific variety bred for a thick, moisture-sealing hull that traps steam and causes the kernel to explode when heated. Sweet corn hulls are too soft; they'll just scorch. If you want to grow your own popcorn, you need popcorn-specific seed, and you have to let the kernels dry completely on the stalk before harvesting. If you're struggling with popcorn kernels, it's likely because they are old, low-quality, or you aren't applying enough heat.