To make your own yellow cornmeal, grind yellow popcorn kernels in a grain mill or high-powered blender in small batches until it is ground into a fine grain. Sift the meal once during the process to check for any missed larger pieces.
If using a blender, grind the popcorn kernels once on a coarse setting before finishing on a finer setting to get the desired consistency. This process puts less stress on your machine and ensures that it will not overheat. If you do not own a grain mill or high-powered blender, use a spice or coffee grinder for small batches.
Most homemade cornmeal is made from field corn, but store-bought yellow popcorn kernels are more convenient and equally nutritious. In fact, homemade cornmeal is likely more nutritious than what is available at the grocery store because most store-bought cornmeal is degerminated. This process gives the product a longer shelf-life but also removes the vitamin-packed germ, which is the most nutritious part of the kernel.
A 32-ounce bag of yellow popcorn kernels yields 5 1/2 cups of yellow cornmeal. For maximum freshness, only grind what you need for your recipe, though you can also store small batches in the freezer to use at a later date.