If I had to choose only one grain to grow it would be corn. Of the great variety of products corn can become, hominy is essential. Whether dent or flint, these corns are perfectly edible and are eaten as polenta and grits, but their kernel’s hull bind up niacin which causes deficiencies that lead to health conditions like Pellegra. In comes the innovative technique called nixtamalization. It was eventually discovered that corn soaked in an alkaline brine dissolved the hemicellulose walls of the corn and freed the niacin for human to ingest. Additionally the process softened the kernels and in some cases dramatically increased the minerals available and greatly reduced mycotoxins.
So how’s it done? Two ways of creating a proper alkaline brine is through the addition of lime (from stone) and lye (wood ash). Lime, also known as Cal, is limestone baked at a really high temperature (converting the calcium carbonate to calcium oxide), then when treated with water (where it becomes calcium hydroxide), and dehydrated to a fine white powder as lime or Cal. It naturally increases the kernel’s minerals when used in processing as well as influencing the familiar aromas we associate with tortillas. Lye on the other hand, being more widely accessible, was used by people who might not have had access to limestone deposits, as it is produced by soaking wood ash in soft water. There is food grade lye you can buy which works the same as a wood ash solution but lacks the mineral contribution provided by natural wood ash.
How its done
Get yourself some field corn, whether flint or dent, either will do. Your best bet is to grow it yourself if you can. But if you can’t, research the Open-pollinated varieties grown in your area. Popular out our way is Wapsi Valley, which is a dent corn pictured above (note the dents on the tops of the kernels). We found it by researching OP corn for feed for sale locally and learned more about the varieties, such as how they are actually delicious heirlooms. If you tell the farmer you buy the seed from that your eating it they may think your crazy as lots of people think it’s just for livestock anymore.
Either way, when you have some corn, weigh the threshed kernels and put them in a pot and cover with water to about 2-3 extra inches above the kernels. Add Cal at about 1 gram per every 100 grams of corn. If you’re looking for Cal, check out a grocery store from Central and South America. For the lye method see below.
Bring the pot to a simmer and let it go until the kernels are a little tender. It could take around 45 minutes, or more or less. Caution that boiling with Cal can create bitter flavors.
Remove pot from heat and let it sit for 24 hours.
Strain the kernels and give them a rinse while also massaging them. You now should be seeing the hulls wash off like whispy, soggy paper. The job is done. Wash off the husks according to what you intend to make. Retaining the hulls adds some gelatinization which is helpful in making thin products like tortillas.
The hominy can now be stored a couple different ways. They can be frozen as they are, or dehydrated and stored dry, in which you would soak them like any other grain before cooking or grinding them into hominy grits. You can also grind them fresh to make tortillas for dinner tonight!
If you’re using food grade lye use roughly the same ratio as above 1 gram lye for 100 grams of kernels. For information on food grade lye and/ or using wood ash itself you can refer to this post regarding lye and bagels. Sodium hydroxide, which is what pure lye is, in the right quantities can burn you so use care in avoiding skin contact with the lye brine if you’re using this method.
Cover threshed corn with water, add lye granules or lye brine, and bring to a boil.
Simmer for 30 minutes, turn off heat and steep for another 30 minutes.
Drain the lye water and soak in clean water for 30 minutes.
Change the water once again and bring to a boil one more time, and simmer until kernels are tender. Wash hulls as you wish.
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