Looking at my mother's Xmas cookie recipe the other day, and I always get a kick out of her listing 1 cup butter (oleo) as an ingredient. I don't think I've had "oleo" in my fridge for at least 20 years, whereas my mom for either economic or "health" reasons only rarely had butter.
And when I wanted to make banana bread today, the Better Homes & Gardens cookbook recipe has shortening as an ingredient, which I almost never have on hand. Mom always used it instead of veg oil to fry chicken, as well as for baking.
So my list of "what Mom always had around, but I never do" includes:
nondairy coffee creamer
canned fruit cocktail
Anyone else? (Of course I have a list of what I have around that my mother never did, but that is a different subject!)