Corn Flour
Corn flour is whole corn kernels ground into a fine, powdery flour, finer than cornmeal but coarser than cornstarch. In the United States it usually refers to this finely milled whole-grain corn product used in breads, batters, and tortilla-style doughs. In the United Kingdom and much of the rest of the world, "cornflour" instead means pure corn starch, the same thing Americans call cornstarch, so it's worth checking a recipe's country of origin before buying.
Varieties
Yellow corn flour has a sweeter, more robust corn flavor and a golden color; white corn flour is milder and paler, often preferred for delicate baked goods. Blue corn flour, milled from blue corn, has a slightly nuttier, earthier taste and is common in Southwestern US cooking.
Buying tips
Check the label carefully: in the US, look for "corn flour" made from whole corn, not "cornflour" imported from the UK, which is cornstarch. Buy from a brand with good turnover since the corn germ can go stale, and store any leftover portion promptly after opening.
Substitutes
Masa harina — 1:1
Made from corn that has been nixtamalized (treated with lime), so it carries a deeper, slightly mineral corn flavor and binds better for tortillas and tamales.
Fine cornmeal, ground further in a spice or coffee grinder — 1:1
Standard cornmeal is coarser; pulse it in short bursts until powdery to approximate corn flour's texture in baked goods.
Rice flour — 1:1
No corn flavor and a lighter texture, useful in gluten-free blends where corn flavor isn't wanted, but the crumb will be less tender in cornbread-style recipes.
All-purpose flour blended with fine cornmeal (half and half) — 1:1
Reasonable stand-in for baking recipes; the loaf or batter will be softer and less distinctly corn-flavored than one made with true corn flour.
Cornstarch (only for thickening, not baking) — 1:2 (use half as much)
Cornstarch is a pure starch with roughly twice the thickening power of corn flour, so it works only in sauces and gravies, never as a swap in bread or tortilla recipes.
Storage
Keep corn flour in an airtight container in a cool, dark pantry for up to 6 months. Because it contains the corn germ's natural oils, it can turn rancid faster than refined flours; refrigerating or freezing it in a sealed bag extends shelf life to about a year.
How to use
Used in cornbread, corn tortillas made without nixtamalization, pancakes, some fried batters, and as a partial substitute for wheat flour in gluten-free baking. It also thickens stews and soups when whisked into a slurry, though less efficiently than cornstarch.
What it pairs with
Works well with buttermilk, cheddar, honey, and chili peppers in cornbread and skillet bakes, and pairs naturally with beans, pork, and roasted vegetables in Latin American and Southern American dishes.
Nutrition
Corn flour retains the whole kernel including the germ and bran, so it has more fiber and B vitamins than cornstarch, which is pure starch with almost no nutritional value beyond calories.
FAQ
Is corn flour the same as cornstarch?
No, not in American usage. Corn flour is ground whole corn kernels including fiber and germ, while cornstarch is a refined starch extracted from corn with no fiber, protein, or flavor. British "cornflour" is the exception, since it refers to what Americans call cornstarch.
Is corn flour the same as masa harina?
No. Corn flour is made from raw dried corn, while masa harina is made from corn that has been nixtamalized in a lime-water solution first, giving it a distinct flavor and better ability to form a cohesive dough for tortillas.
Can corn flour be used to make tortillas?
Plain corn flour will not hold together the way masa harina does because it lacks the nixtamalization process; it can be blended into a dough but the tortillas will be more crumbly and less pliable.
Why does corn flour go rancid faster than wheat flour?
It retains the corn germ, which contains natural oils that oxidize over time; refrigerating or freezing corn flour slows this process significantly.
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