Grains & Rice

Blue Corn

Deep blue-purple heirloom maize ground into nutty masa and tortillas.

Blue corn is an heirloom maize with deep blue to purple kernels colored by anthocyanins, traditional to Indigenous peoples of the Southwest US and Mexico. Nixtamalized and ground, it makes nutty, slightly sweeter masa for tortillas, atole, and chips. Its color softens to grey-violet once cooked.

Blue corn is an heirloom variety of maize (Zea mays) cultivated for centuries by the Hopi, Navajo, and Pueblo peoples of the Southwestern US and by Indigenous communities throughout Mexico. Unlike commodity corn bred for yield and sweetness, blue corn was selected over generations for its deep navy-to-purple-black pigmentation and complex flavor. The anthocyanin antioxidants responsible for the color are concentrated in the aleurone layer, the outermost starchy tissue of the kernel, which means the bran carries both the pigment and much of the nutritional value. The flavor is distinctly nuttier and sweeter than yellow corn, with subtle earthy and lightly smoky undertones that make it immediately recognizable in any preparation. Its behavior in the kitchen differs from white or yellow corn: blue corn dough tends to be drier, the masa is more cohesive, and the color intensifies with heat rather than fading, making it particularly striking when fried or toasted.

Measured in: g
Storage: Pantry

Types & varieties

Hopi Blue

The premier commercial variety; deep navy color, intensely nutty; sacred to the Hopi people of northern Arizona

Tarahumara Blue

Indigenous Mexican variety from Chihuahua; smaller, darker kernels; traditional for tortillas and pinole

Sioux Blue

Northern Plains variety; lighter blue, softer texture when ground

Azul

Common commercial variety in Mexico; medium blue intensity, widely available

Black Aztec

Dark blue-black, heirloom variety; intensely pigmented; used for pozole and atole

Nixtamalization: The Non-Negotiable Step

Blue corn, like all dried corn, must be nixtamalized—cooked in an alkaline solution with food-grade calcium hydroxide (pickling lime)—before grinding into masa. This process does three things: it breaks down the hemicellulose in the pericarp, making the kernels easier to grind; it releases niacin from bound compounds, preventing pellagra; and it creates the characteristic texture that holds together when hydrated. Skipping nixtamalization produces a gritty, poorly bound dough that cracks and falls apart.

Use 1 liter water per 500g dried corn
Add 5–10g food-grade calcium hydroxide (lime) per liter
Simmer 15–20 minutes until kernels split visibly
Soak overnight (12+ hours) in the cooking liquid
Rinse thoroughly 3–4 times, scrubbing to remove loosened pericarp

Why the Color Behaves Differently

Blue corn's anthocyanins are water-soluble but heat-stable, a combination that produces dramatic visual results in the kitchen. When you fry blue corn chips or toast tortillas, the color deepens noticeably from medium blue to an almost black indigo. This is the opposite of many natural colorants that fade under heat. The pigment is also concentrated in the bran layer, so coarser-ground meal shows a more striking color than fine flour, and products made from whole-ground blue corn will be more intensely colored than those using only the starchy endosperm.

Common uses

Blue corn tortillas—the most recognizable product; sturdier and less likely to tear than white corn tortillasBlue corn chips and tostadas—distinctive color and slightly sweeter flavor that holds up to heavy dipsNixtamalized masa for tamales, sopes, and tlacoyos—traditional preparations where the blue color is part of regional identityBlue cornmeal for cornbread, pancakes, and waffles—adds color and a nutty dimension beyond standard yellow cornmealAtole azul—the blue variant of traditional hot masa drink, especially for Day of the Dead celebrationsPozole azul—blue hominy-style pozole, traditional in central Mexico where the blue color signals the heirloom varietyBlue corn flour in baking—cookies, quick breads, and muffins for visual impact and mild flavor variationDecorative whole cobs—dried and displayed as cultural artifacts; not typically eaten as sweet corn

Tips & pitfalls

Authentic blue corn products list blue corn as the primary ingredient—beware of yellow corn with blue food coloring added; check the ingredient list and avoid products that list blue corn after yellow corn or contain artificial colorants
For homemade tortillas, nixtamalize dried corn with food-grade calcium hydroxide at 1 liter water per 500g corn, simmer 15–20 minutes until kernels split, then soak overnight and rinse thoroughly before grinding
Stone grinding (using a metate or stone grain mill) produces superior texture over steel-ground masa—the slow grinding preserves the germ oils and creates a smoother, more cohesive dough
Blue corn dough tends to be drier than white or yellow corn—add water sparingly when mixing to achieve a Play-Doh-like consistency that holds together without cracking
Commercial blue corn meal and flour are already nixtamalized—do not treat again with lime or the dough will be bitter and overly alkaline
When making blue corn chips, cut tortillas into wedges and fry at 350°F (175°C) for 1–2 minutes per side until crisp—the blue color deepens noticeably during frying
Store dried whole blue corn in airtight glass containers away from light to preserve anthocyanin potency; the pigments degrade when exposed to prolonged sunlight
For the deepest color, use Hopi or Tarahumara varieties—the color concentrates in the outer bran layer so coarse-ground meal shows color better than fine flour

Nutrition

364kcal

Energy

1523 kJ · per 100 g

Where the calories come from

Protein 9%Carbs 79%Fat 12%

Protein

8.8g

18% DV

Carbs

73.9g

27% DV

Fat

5.1g

7% DV

Fiber

8.4g

30% DV

Sodium

5mg

0% DV

Notable micronutrients

Vitamin B628% DV

Magnesium26% DV

Phosphorus21% DV

Zinc20% DV

Riboflavin (B2)18% DV

Niacin (B3)16% DV

Source · USDA FoodData Central · Corn flour, whole-grain, blue (harina de maiz morado)

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

Origin: Southwestern US and Mexico; cultivated for centuries by Hopi, Navajo, and Pueblo peoples
Type: Heirloom maize (Zea mays)
Pigmentation: Anthocyanins in the aleurone layer; color ranges from navy blue to purple-black
Primary Form: Dried whole kernels; ground into flour, meal, or nixtamalized masa
Flavor Profile: Nuttier and sweeter than yellow corn; subtle earthy, slightly smoky notes
Shelf Life (dried): 6–12 months in airtight container in cool, dry storage; up to 1 year in freezer
Shelf Life (fresh ground): Refrigerate up to 1 week; freeze up to 6 months
Nutrition Note: Higher protein than commodity corn; rich in anthocyanin antioxidants; good source of iron and zinc

Substitutes

Yellow cornmeal — Closest functional substitute; lacks the blue color and nuttier flavor but works in equal proportions for cornbread, pancakes, and batter
White corn masa — Direct substitute for tortillas and chips; same nixtamalized base, milder flavor, pale color
Purple sweet potato flour — Provides similar deep blue-purple color in baked goods; flavor profile differs significantly
Blue butterfly pea flower powder — Natural blue colorant for non-corn applications; no structural or flavor similarity to blue corn

Pairs with

Queso fresco and cotijaBlack beansChilesEpazoteLime Avocado Cilantro Cumin Achiote (annatto)

Also called

Maíz Azul