Corn flour can be purchased at local grocery stores in the baking aisle. If it can't be found nearby, there are several online sources to purchase the ingredient.
Often mistaken for cornmeal, which is used for breading fish and making johnnycakes, corn flour is used for baking cakes and pies. Corn flour comes in white or yellow varieties, and it is processed from the full kernel of corn. Yellow corn flour is primarily used in corn tortillas, while white corn flour is used to thicken soups and mix with wheat flour.
Discovered in the Americas, corn has become the base for many recipes around the world.