Food Guide

Corn

Buying Tips

Peak season for fresh corn is May through September. Good quality white or yellow corn should have fresh green, tightly fitting husks, with golden brown silk, and tip ends that are free of decay. Ears should be evenly covered with plump, consistently sized kernels. Avoid corn that has been on display with husks pulled back, or with discolored or dry-looking husks, stem ends, or kernels.

Varieties

Today, the most popular varieties of corn are white (Country Gentleman) and yellow (Golden Bantam). Yellow corn has larger, buttery-flavored kernels, while white corn kernels are smaller and sweeter. Blue corn (which is literally blue) has the widest range of flavor components and is often used as an ingredient in chips.

Canned and frozen corn are widely available, and dehydrated corn is a common ingredient in trail mixes.

Everyone’s favorite movie partner, popcorn, is made from a corn variety that “pops” when exposed to dry heat, forming a featherweight, white, starchy mass many times the size of the original kernel. Most often served plain or topped with butter, popcorn is also sold topped with cheese, caramel, and other flavorings.

Indian corn has white, red, purple, brown, or multicolored kernels. It was the original corn grown by American Indians and is often used in the fall for decoration.

Tiny cobs of baby corn, often found in Thai or Chinese cooking, are sold in cans or jars. Fresh baby corn is also available and can be enjoyed either raw or cooked.

Preparation, Uses, & Tips

Fresh sweet corn must be cooked and is generally steamed or boiled and served as a side dish. Strip off the husks and silk just before cooking.

To boil, bring a large pot of water to bubble over high heat. Cook in batches, with husks and silks removed, adding a few ears at a time, so the water continues boiling. For fresh young corn, cook for 30 seconds—just long enough to heat the corn through; boil more mature corn for up to three minutes. Do not add salt to cooking water since that will toughen the corn.

To steam, remove husks, arrange corn on a steaming rack, and place the rack over about 1 inch (2.5cm) of water. Bring to a boil, cover, and steam for about 10 minutes.

Grilled corn on the cob is a summertime favorite. (The cob or the ear of the corn plant is actually a branch.) First, peel back the husks and remove the silk, then bring the husk back over the cob. Soak the corn ears in their husks in cold water for a few hours before grilling—this moisture will let the corn steam as it grills, making it juicier. To grill, wrap each ear of corn tightly in aluminum foil, place on a prepared preheated medium-hot grill, and cook for about 30 minutes, turning occasionally, until corn is tender. Serve hot off the grill, with butter or margarine, if desired.

Corn husks are used primarily in making tamales, but they are also used to wrap other foods for steaming. Latin markets sell packaged cornhusks, which must be softened before using. To do so, soak husks in very hot water for about 30 seconds, then drain, pat dry, and use according to the recipe.

Fresh corn kernels may be used as an ingredient in soups, stews, casseroles, puddings, relishes, and breads.

Corn is used to make cornmeal, which is simply finely ground corn kernels. Cornmeal is used to make cornbread. A coarser grind is also used to make polenta, a popular Italian dish. Polenta can be served hot with butter or margarine, if desired, or cooled until firm and then cut into squares and fried. It is often mixed with cheese and topped with savory vegetables.

Corn is also used to make masa, the form of cornmeal used in tortillas. Cornstarch is derived from the endosperm portion of the corn kernel and is most commonly used as a thickening agent.

Hominy, served as a side dish or as a casserole ingredient, is another way of preparing corn. A staple of the American Indians, hominy is made from dried white or yellow corn kernels from which the tough hull and germ have been removed. It is available canned, ready-to-eat, or dried. Usually, ground hominy is called “grits.” This side dish is prepared by simmering the corn bits with water or milk until thick, much like oatmeal.

Storing

It’s best to cook corn as soon as possible after it is picked or purchased. This is because, after being picked, the corn’s natural sugars gradually convert to starch, which, in turn, lessens the corn’s natural sweetness. Because corn is highly perishable, it should be refrigerated immediately after you buy it. Fresh corn can also be purchased canned or frozen.

Nutrition Highlights

Corn (sweet, yellow, raw), 1 medium ear (6 3/4–7 1/2 inches [17.1–19cm] long) (90g)

  • Calories: 77
  • Protein: 3g
  • Carbohydrate: 17g
  • Total Fat: 1g
  • Fiber: 2g

*Good Source of: Folic acid (41.40mcg), Thiamin (0.18mg), and Vitamin C (6.12mg)

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The information presented in the Food Guide is for informational purposes only and was created by a team of US–registered dietitians and food experts. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements, making dietary changes, or before making any changes in prescribed medications. Information expires December 2024.