Green bean casserole might be the most beloved “back-of-the-box” recipe of all time. This dish came into home kitchens in the 1960s when Campbell’s began printing the recipe on the back of soup cans.

Meatloaf is a versatile dish that can be served with all sorts of vegetable side dishes. But a recently unearthed Campbell's tomato soup ad from 1966 suggests kicking your meatloaf dinner up a notch ...