Popular foods of the mid 1800's and early 1900's?

Well, first of all, you could type this into google to get some good answers. That would be easiest. But, it sort of depends on which class you are talking about, too. You probably know that there were three classes:

Upper

Middle

Lower

Most people were lower class. Wealthier people ate things like:

Cow Stomach

Steaks

Dairy Products (These were mainly for the wealthier, because they couldn't store them for very long periods of time)

Bread

Puddings

Etc.

The middle class ate things that were mostly the same as listed for upper class, but in smaller portions.

Lower class ate:

Bread

Potatos

Soups