Food was all real back then.
Food didn't have the same function as it does for us today. It was a means to survival, and if it tasted good, that was great. No fresh vegetables after December, unless you had some cabbage or carrots in the root cellar. You ate because you had to. And you had to cook it all yourself, from scratch, without a microwave. Canned beef, yum!
I have one of my mother's old cook books. It has an entire chapter on what the least expensive ways to meet the caloric requirements for the family were. Lots of calorie comparisons, and cost comparisons for meeting your caloric minimums. Sugar and fat were both quite expensive. Lean cuts were cheaper in many cases than fattier cuts. True "home ec".