This French Onion Soup is easy to make, and while my husband makes a traditional version, I make a vegetarian version. You can freeze and refrigerate many of the ingredients so that you have them on hand to make this recipe with less prep time.
~ olive oil
~ 1 large onion (we usually choose yellow)
~ vegetable broth or bouillon
~ Swiss Gruyere cheese
Preparing the Croutons
The first step to this recipe is preparing your soup croutons ahead of time. For this you will need a baguette.
Slice into approx. 3/4″ slices, drizzle with olive oil, and place on a cookie sheet. Bake at 275 degrees until completely hard. This will depend on your bread, but our last batch took 1.5 hours.
We prepare a lot of croutons and then keep a bunch on hand, sealed in an airtight bag in the freezer. This makes it easy to quickly prepare French Onion Soup any time.
Preparing the Soup
For each soup serving, we use 1/2 to 1 whole onion, depending on the size of the onion. You can also saute multiple onions if prepping extra ingredients ahead of time.
Cut up your onion, and caramelize in a pan with butter or olive oil. Like the croutons, you can make a very large batch and freeze.
Prepare a bowl of broth. You can use regular beef broth, or a vegetable bullion. I use Organic Better Than Bouillon Vegetable Base, which comes as a concentrate/paste in a jar.
Add the onions. For one serving I use several heaping tablespoons, but it is up to your personal preference just how much you want.
At this point, make sure that your broth/onions are very hot, so you may want to pop your bowl in the microwave.
Place your bread/croutons on top of the soup. Have your cheese sliced so that the bread doesn’t sit in the hot broth and get soggy.
Place slices of Swiss Gruyere cheese on top.
Place your soup bowl(s) on a cookie sheet in the oven, broiling until the cheese is melting and bubbly (and as crisp as you like!).
Check out our other vegetarian recipes on the blog!
About the Author: Marysa
Busy blogger and mom of two girls! We love traveling and the great outdoors, and are always looking for our next adventure!
I love a good grench onion soup. I thought I was the only one to add cheese! I love your croutons they look so good.
This is hubby’s favorite soup. I will have to make this for him.
Oh that looks delish. Perfect for this cold season coming ahead. Soup plus bread is what I need for breakfast
Yum! French onion soup is one my fall favs! I’m trying this recipe soon!
I haven’t had french onion soup for a really long time. But now, with this easy and simple recipe, I got to give it a try!
Never heard or tried this soup before. Looks delicious though. Perfect for the winter season.
French onion soup is my fav. I’m going to try this out.
It is starting to get chilly which means soup season here and this looks delicious! I will have to add this to the menu one of these chilly nights.
this looks so good and seems so easy to make to that i wonder why i have not made it before. thanks for the recipe!!
Oh yum, this is one of my favorite soups ever. I will have to make it when it gets chilly out.
I love french onion soup. This recipe is perfect for dinner tonight.
This looks incredible! I love French onion soup and I like to try different recipes for it.
My family’s not fond of onion soup but I will definitely love this. Your croutons looks so great!
I love onion soup, this seems perfect while eating buttered fried chicken or pastas of any kind.
This looks absolutely delicious! I haven’t had French Onion Soup. I like that this recipe isn’t difficult to follow.
I haven’t had French Onion soup in a very long time but I’m going to have to make this recipe. Thanks for sharing
I’ve never made french onion soup at home but I do love this soup at restaurants. Now I want to try to make this at home.
I have never made a homemade version of french onion soup. I feel like my family would love this savory dish.
It’s one of my favorite soup! I need to make it for my family! I am sure they will love it!
This is hands down my absolute favorite soup and I order it anytime that I go out to eat. This recipe to make at home looks delicious! Definitely making this one today!
I have never had french onion soup before! This looks delicious and healthy 😍 I’ll definitely give this recipe a try🙂
The cheese!! I do love a good French Onion Soup…traditional or vegetarian!
French onion soup is the best when it is a recipe that is a good recipe. Your recipe looks like that is one of those recipes! I am looking forward to trying it out.
SOOO good! The bread and cheese together with the rich broth. Oh my.
I could use some of that now. It is a cold rainy day here, but I don’t have the right cheese to make it.