Yellow flour made from maize is essentially finely ground, dried whole corn kernels. In the United States, it's commonly known as corn flour (note the space between "corn" and "flour"). It's the same product that's referred to as "maize flour" in the UK.
Essentially, corn flour is produced by milling dried corn kernels to a fine consistency. This process is similar to making cornmeal, but the flour is ground more finely.
Here's a simple breakdown:
- Ingredient: Dried whole corn kernels
- Process: Grinding/milling
- Product: Finely ground yellow flour (corn flour/maize flour)