Hominy is corn, but corn that has been fundamentally transformed through an ancient cooking process. Dried corn kernels are soaked and cooked in an alkaline solution, typically water mixed with slaked lime or wood ash lye, which loosens and removes the tough outer skin of each kernel, softens the interior, and causes the kernels to swell to roughly twice their original size. What comes out looks, tastes, and behaves nothing like the corn that went in. The difference isn’t just a matter of preparation; the chemical makeup of the kernel changes in ways that affect nutrition, flavor, texture, and even safety.
How Corn Becomes Hominy
The process that turns corn into hominy is called nixtamalization, a technique developed thousands of years ago in Mesoamerica. Dried field corn (not sweet corn) is simmered in water with an alkaline substance, usually calcium hydroxide (known as “cal” in Mexican cooking) or lye made from hardwood ash. The kernels soak in this solution for several hours or overnight.
During that time, the alkaline water does three things. First, it dissolves the pericarp, the thin but tough outer hull that covers each kernel. Second, it partially breaks down the protein matrix surrounding the starch granules inside the kernel, causing the starch to absorb water and begin to gelatinize. This is what makes the kernels puff up and turn soft and chewy. Third, it triggers chemical changes in the corn’s proteins and starches that alter how the body digests and absorbs nutrients from the grain. After soaking, the kernels are rinsed thoroughly to wash away the dissolved hull and any remaining alkaline solution, leaving behind plump, pale, slippery kernels: hominy.
Taste and Texture Differences
Plain dried corn has a mild, starchy flavor and, once cooked, a firm, somewhat grainy texture. Hominy tastes distinctly different. The alkaline treatment gives it an earthy, slightly mineral quality, sometimes described as “tortilla-like,” which makes sense because corn tortillas are made from the same nixtamalized corn ground into dough (masa). The flavor is deeper and more complex than plain corn.
Texturally, the two are worlds apart. Hominy kernels are bigger, softer on the outside, and chewy in the center. Because the hull is gone, they have a smooth surface with a slight slipperiness. When you bite into a piece of hominy, it yields more easily than a plain cooked corn kernel, but it still has a satisfying, almost bouncy resistance at its core. This texture is what makes hominy the base of dishes like pozole, where the kernels hold up during long simmering without turning to mush.
Nutritional Changes
The most important nutritional difference between corn and hominy involves niacin, one of the B vitamins. Corn contains plenty of niacin, but in its raw form it’s chemically bound in a way that the human body can’t absorb. The alkaline treatment during nixtamalization breaks those bonds and releases niacin into a form your body can actually use. This is why populations that historically ate corn as a staple but didn’t nixtamalize it, such as parts of the American South and southern Europe in the 18th and 19th centuries, suffered widespread pellagra, a severe niacin deficiency disease. Populations in Mexico and Central America, where nixtamalization was standard practice, did not.
The process also increases the available calcium in the grain significantly, because the kernels absorb calcium from the lime solution they soak in. The protein quality improves as well: the alkaline treatment makes certain amino acids more accessible during digestion. One trade-off is that some of the B vitamins besides niacin are partially lost during soaking and rinsing, though the overall nutritional profile is considered superior to untreated corn.
Resistant starch, a type of fiber that feeds beneficial gut bacteria rather than being digested in the small intestine, also increases during the process. Research has measured resistant starch roughly doubling from raw corn to the finished nixtamalized product, rising from about 2.6% to over 5%.
Food Safety Benefits
Corn is particularly susceptible to contamination by aflatoxins, toxic compounds produced by molds that can grow on the grain during storage. Aflatoxins are a serious health concern, linked to liver damage and cancer with chronic exposure. Nixtamalization substantially reduces these toxins. Studies have found that aflatoxin levels drop by 15% to 92% during the soaking stage alone, and by the time the corn is processed into masa (the ground dough made from hominy), reductions of 60% to 98% have been measured depending on the initial contamination level and processing conditions. The alkaline environment degrades aflatoxin molecules, and much of what remains gets washed away with the discarded hull and soaking liquid.
How Each One Is Used
Dried corn in its unprocessed form gets ground into cornmeal, corn flour, grits, and polenta. It’s also the raw material for corn starch, corn syrup, and animal feed. Sweet corn, a different variety, is the type eaten fresh off the cob or canned as a vegetable.
Hominy takes a different path. Whole hominy kernels are sold canned or dried and used in soups and stews, most famously pozole. Ground hominy becomes masa harina, the flour used for corn tortillas, tamales, pupusas, arepas, and other staples across Latin American cuisines. Coarsely ground hominy produces hominy grits, a Southern U.S. staple that has a creamier, more flavorful character than regular corn grits. If you’ve ever wondered why a corn tortilla tastes so different from cornbread, the answer is nixtamalization: the tortilla is made from hominy, the cornbread from plain corn.
Types of Hominy
You’ll find hominy sold in a few forms. Canned hominy is the most convenient, already fully cooked and ready to add to recipes. It comes in white and yellow varieties, corresponding to the color of the original corn. White hominy tends to be slightly milder, while yellow has a faintly more “corny” flavor, though the difference is subtle. Dried hominy needs to be soaked and simmered for several hours before eating, much like dried beans, but rewards the effort with a firmer, meatier texture.
Masa harina, the dried flour made from ground hominy, is sold in most grocery stores and is the starting point for making tortillas, tamales, and other doughs at home. It behaves completely differently from regular cornmeal or corn flour because the starch has already been partially gelatinized during nixtamalization, giving it the ability to form a smooth, pliable dough when mixed with water. Regular cornmeal can’t do this.