We have been storing food for years and rotate it by either eating the stuff after 3 to 5 years or donate it to charity as we replace it.
The comfort food is a must as stated, to help ease you into a beans and rice and a, what you can raise or grow diet.
Whole wheat, rice and beans store easily, and having extra sugar and salt are a must as these are used to salt or sugar cure meat etc. And as a trade item down the road.

Also spices are a must for meats and deserts, 'young children grow tired of a bland diet very fast and threats won't work on getting them to eat, a little (powdered) milk, cinnamon and sugar mixed with thick rice makes a nice rice pudding, or on the oatmeal and it's all gone in three shakes of a lambs tail. When the kids get older they will adjust better.' I read this in a book that was first published in 1848 for foods to carry on the trek west of Missouri, (I added the powdered milk as we don't have any milking cows.)

Check out www.mredepot.com for canned butter and cheese the products are very good and we have purchased them in bulk for our unit.

If you practice IA drills, mock bug out routes etc, then you need to eat the stuff you store in a practice drill and know how to make a balanced meal with it. Lots of books out here especially ones from people who lived through WWII. The British and French ones are the best as they faced far worse shortages then our parents and grandparents had to in the US and they made do very well.