For years I have been under the misconception that cornmeal could not be stored for long periods of time.Â I always believed that it would turn the oils rancid. Â As a result, I have always stored popcorn or dent corn in whole kernels. Â In this form, it stores well, but not all grinders will handle whole grain corn.Â Some like the Country Living Grain Mill will, but many of the lower-priced ones will not handle it.
I recently came across some information form BYU (Brigham Young University) in Utah.Â Because of being LDS they do a lot of research on the storage life of various foods.Â A recent study that they conducted involved the storage of corn meal.Â Number 10 cans of corn meal with low oxygen content from 1-33 years old were studied. Â The results indicated that it was acceptable for use.
The study available at https://scholarsarchive.byu.edu/facpub/29/ statedÂ â€œThere was no significant decrease over storage time in aroma, texture, flavor, and overall acceptability in corn meal, cornbread or corn meal cereal.â€Â It lost color becoming significantly less yellow and red during storage.
Based on this study I feel that storing in number 10 cans or Mylar bags with oxygen absorber is quite acceptable.