French Onion Soup is a free game for girl to play online at MaFa.Com. You can play French Onion Soup in your browser for free. French onion soup is an onion soup based on beef broth or chicken stock or vegetable stock traditionally served with croutons and cheese as toppings. The rich flavor of the base is not due just to the broth, but to the caramelized onions. Learn how to make French Onion Soup by following this easy recipe. Enjoy!