Grains & Rice

Red Corn

Deep red heirloom maize ground for colorful masa, tortillas, and atole.

Red corn (maíz rojo) is a heirloom maize with deep red to burgundy kernels, grown across Mesoamerica and the Americas. Nixtamalized and ground, it produces vividly colored masa for tortillas, tamales, and atole with an earthy, slightly sweet flavor. Its pigments come from antioxidant-rich anthocyanins.

Red corn designates several heirloom Zea mays landraces distinguished by red to burgundy pigmentation concentrated in the pericarp and aleurone layer, derived from anthocyanin compounds rather than the yellow xanthophylls of commodity corn. Unlike standardized modern dent corn bred for maximum starch yield, these varieties were selected over centuries by Mesoamerican farmers for specific culinary qualities: depth of flavor, visual impact, and performance in regional preparations. The category encompasses diverse Mexican landraces—Chapalote, Xoy, Cacahuazintle—plus related varieties from Guatemala and the Andean region. What sets them apart is not merely color but fundamentally different endosperm composition and flavor architecture: where commodity corn tastes starchy and flat, heirloom red corn registers as nutty, faintly sweet, with an earthy complexity that shifts by variety and terroir. The processing method is non-negotiable: dried red corn must be nixtamalized—cooked in alkaline water with food-grade lime or wood ash—before grinding. This step accomplishes three things simultaneously: it loosens the hull for easier grinding, makes niacin bioavailable to prevent pellagra, and neutralizes aflatoxins that can accumulate in stored whole kernels when conditions favor mold growth. The result is a masa with superior flavor and texture compared to commercial masa harina, though one that behaves differently in the hands of a cook: it grinds coarser, holds hydration differently, and produces tortillas with a more pronounced corn presence rather than a papery, bland wrapper.

Measured in: g
Storage: Pantry

Types & varieties

Chapalote

One of the oldest surviving heirloom corns in the Americas; ranges from reddish-brown to deep red; versatile for pinole, tortillas, and pozole

Cacahuazintle

Red-tinged white corn from Oaxaca; traditional variety for pozole and atole; large kernels with good expansion when nixtamalized

Xoy

Red corn from the Yucatán Peninsula; regional landrace with distinct terroir-driven flavor; excellent for regional Yucatecan preparations

Maíz Morado

Deep purple-red; used for beverages and atole in Peru and Bolivia; not typically used for Mexican-style tortillas

Chotkas

Small red corn from Guatemala with high anthocyanin content; traditional for Central American applications

The nixtamalization imperative

Nixtamalization is not optional for culinary use—it is a food safety and nutrition requirement. Dried whole-kernel corn contains phytic acid and trypsin inhibitors that block nutrient absorption, and heirloom varieties can harbor aflatoxin-producing molds if stored improperly. The alkaline nixtamalization bath, typically 1–2% food-grade lime by weight dissolved in water, converts nixtamalized corn into true masa. The process typically requires simmering the corn-lime mixture for 15–20 minutes for white corn, then resting overnight with the heat off. Red corn varieties often require longer simmering—30–45 minutes—because many heirloom strains have a tougher pericarp. The kernels are ready when the hull slips off easily when rubbed between your fingers; test individual kernels rather than relying on timing alone.

Use food-grade calcium hydroxide (slaked lime), not construction lime or wood ash of unknown composition
The traditional ratio is approximately 1 part corn to 3 parts water by volume, with 1–2% lime by corn weight
Red varieties may need 30–45 minutes of simmering plus extended overnight rest—test hull release by hand

Stone grinding versus home methods

Traditional nixtamalized corn is ground on a metate (ground stone) or traditional stone mill, which produces a coarse, uneven grind that retains more flavor compounds and creates tortillas with genuine corn character. Commercial masa harina, by contrast, is ground extremely fine and flash-dried, resulting in a neutral-flavored, predictable product. At home, you have two practical options: a heavy-duty grain mill or a high-powered blender. Neither replicates stone-grinding exactly, but they produce serviceable results. The critical variable is temperature: nixtamalized corn grinds best when slightly warm, as the lime-treated endosperm is more yielding. If grinding in batches, reheat the nixtamal briefly before each batch. The masa should hold together without crumbling when pressed—adjust hydration by adding nixtamal water or dried corn as needed.

Grain mills work well for nixtamalized corn but require pre-soaking the kernels until soft
Blenders work best with slightly warm nixtamal; work in small batches and use the tamper
Stone-ground masa has visible particles and produces rustic, flavorful tortillas; commercial masa is smooth and consistent

Common uses

Red tortillas and tlacoyos using freshly ground masa from nixtamalized red cornAtole (thick masa-based hot beverage), naturally colored deep red or burgundyPozole rojo, where the broth is colored by the corn combined with dried red chiliesPinole (toasted ground corn meal), traditionally mixed with sugar and spices for drinking or eatingTamales where the masa wrapper is colored and flavored with red cornCornbread and baked goods where visual color and heirloom flavor are desiredHominy for pozole, soups, and stews using whole dried nixtamalized kernelsRegional Andean and Central American preparations using Maíz Morado and Chotkas varieties

Tips & pitfalls

Always nixtamalize dried red corn before grinding: combine 1 part corn with 3 parts water and 1–2% food-grade lime (by weight), simmer 30–45 minutes (longer than white corn), then rest overnight. This releases the hull, makes niacin bioavailable, and neutralizes aflatoxins.
Stone-grinding nixtamalized red corn preserves a coarser texture and more flavor than commercial masa harina. If using a blender, grind while still slightly warm from nixtamalization.
Do not substitute commercial masa harina directly in recipes calling for freshly ground red corn: the flavor, color intensity, and texture differ significantly—you will get a pale, bland result.
Red corn requires longer nixtamalization than white or yellow varieties due to a harder pericarp in many heirloom strains; test by squeezing a kernel—it should slip easily from its hull after resting.
For pozole, select whole dried kernels labeled specifically for hominy; red hominy corn produces a rust-colored broth when combined with dried guajillo or ancho chilies.
Store dried red corn airtight and away from light to preserve anthocyanin color; extended light exposure will fade the pigments noticeably within weeks.
When making atole, dissolve the masa paste in warm milk or water gradually to prevent clumping; the red color will lighten when diluted, so adjust the quantity to achieve your desired intensity.
Avoid grinding cold nixtamal—the lime-treated endosperm becomes rubbery as it cools and will not break down properly, yielding a gummy masa.

Nutrition

86kcal

Energy

360 kJ · per 100 g

Where the calories come from

Protein 13%Carbs 76%Fat 11%

Protein

3.2g

6% DV

Carbs

19g

7% DV

Fat

1.2g

2% DV

Fiber

2.7g

10% DV

Sugars

3.2g

of which

Sodium

15mg

1% DV

Notable micronutrients

Thiamin (B1)17% DV

Folate12% DV

Niacin (B3)11% DV

Magnesium9% DV

Vitamin C8% DV

Phosphorus7% DV

Source · USDA FoodData Central · approx. Corn, sweet, white, raw

View on FDC →

In the shops

Matched grocery products

Sweet Corn
Hacendado · 450 g · Mercadona
€1.55
Sweet Corn Bonpreu
BONPREU · kg · Bonpreu
€1.59
Sweet Corn Bonpreu
BONPREU · kg · Bonpreu
€2.49
Bonduelle Sweet Corn
BONDUELLE · kg · Bonpreu
€1.99
Pickled Corn Kernels
RIOVERDE · kg · Bonpreu
€2.99
Sweet Corn on the Cob
2 ud · Mercadona
€3.15

Good to know

Scientific name: Zea mays (heirloom landrace varieties)
Origin: Mesoamerica; cultivated for thousands of years in Mexico, Central America, and the Andean region
Primary growing regions: Mexico (Oaxaca, Puebla, Jalisco, Yucatán), Southwestern United States, Guatemala, Peru, Bolivia
Color source: Anthocyanin pigments in the pericarp and aleurone layer; concentration varies by variety and growing conditions
Processing method: Nixtamalized (lime-treated), then ground; stone-milling yields a coarser, more flavorful masa than commercial methods
Flavor character: Nutty and faintly sweet with earthy complexity; more nuanced than commodity yellow corn
Niacin availability: Significantly increased through nixtamalization, making niacin bioavailable and preventing pellagra
Shelf life (dried): 6–12 months stored airtight in a cool, dark place; light exposure fades anthocyanin pigments over time

Substitutes

Blue corn — Similar heirloom properties and earthy flavor; produces a blue-violet color rather than red; closest functional substitute for tortillas and masa applications
White heirloom corn — Same processing method and uses but lacks the red anthocyanin color; acceptable in recipes where color is not essential
Ancho or guajillo chili powder — For coloring pozole broth when red corn is unavailable; add to white hominy to approximate the rust-red color, though the flavor profile will differ

Pairs with

Dried red chiliesLime Black beansQueso fresco or cotijaEpazoteCilantro and white onionPiloncillo or dark sugar

Also called

maiz-rojo · Maíz Rojo · Red Maize