typical onion soup recipe from the mid seventeenth century would have involved cutting onions thinly, frying them with butter, and then boiling them in water with bread and capers. This soup would have been served with vinegar.
In the nineteenth century, flour, salt, and pepper were added to the recipe and grated cheese featured as a garnish for French onion soup recipes in the early 1900s.
French onion soup has come a long way since those days and modern onion soup features juicy caramelized onions in beef broth with croutons and a broiled Gruyere cheese topping. Modern onion soup recipes are popular with children and adults and there are a lot of different onion soup recipes so if you are following a special diet you can still enjoy this tasty dish.