French Onion Soup Casserole Recipe | LaaLoosh (2024)

By Wendy

French Onion Soup Casserole Recipe | LaaLoosh (1)

French Onion Soup has always been one of my favorite dishes…who doesn’t love the idea of toasted bread and gooey cheese, melted all over a hot and flavorful onion soup?

But the traditional French Onion Soup recipe is not low calorie or Weight Watchers friendly. I’ve tried a few pre-made, low calorie versions that I’ve found in grocery stores but the taste is either blah or the portion is super small. So I set out on a journey to make my own but also decided to make it as a casserole, just because I was hungry and wanted a meal that had some substance.

It was so easy to make and the finished product was delicious! All the flavors that I love but for fewer Points. And making it into a casserole was really easy. It just basically the soup with more onions and less broth. If you want to make this dish as a soup, just use more broth when making it. So simple, yet so perfect.

And each very large serving is just 5 Points. This low calorie French Onion Soup Casserole Recipe is perfect for warming up on a cold day.

Enjoy!

French Onion Soup Casserole Recipe | LaaLoosh (2)

A casserole version of traditional French Onion Soup, this dish is a real winner. Each serving is very big, and you get all the delicious flavors that are expected. A perfect, low calorie recipe to warm you up on a cold winter day.

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Prep Time 20 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings 4

Calories 237 kcal

Equipment

  • 1 Dutch Oven

  • 1 Oven

Ingredients

  • 5 medium onions - thinly sliced
  • 2 tbsp light butter
  • 1 cup fat free beef broth
  • ½ cup red wine
  • 3 garlic cloves
  • loaf French baguette
  • 4 slices light Swiss cheese - I used Jarlsberg
  • 1 tbsp Worcestershire sauce
  • 1 tbsp balsamic vinegar
  • 1 tsp paprika
  • 1 tsp dried thyme
  • 1 tsp salt
  • ½ tsp black pepper

Instructions

  • Set a large pot or Dutch oven medium high heat, melt butter and add in onions, garlic and salt.

  • Cook, stirring frequently until onions become caramelized, about 30-40 minutes.

  • If onions start to stick to pan, just stir a tbsp or two of the broth as needed.

  • Once onions are caramelized, add in the broth, wine, Worcestershire sauce, paprika, pepper and thyme. Simmer over medium heat for 20 minutes, stirring occasionally.

  • Turn heat to low and add in vinegar and season with additional salt and pepper if desired. Cover and keep over low heat to stay hot while you prepare the bread.

  • Preheat oven broiler. Slice 1/3 of a loaf of French baguette into about 12 slices.

  • Spray a baking sheet with nonfat cooking spray, and arrange baguette slices evenly on sheet. Lightly mist again with an olive oil mister or the nonfat cooking spray and then place in oven for 3 minutes on each side, or until bread is well toasted on both sides.

  • Remove bread from oven and set it to bake on 375 degrees.

  • Pour onion mixture into an 8X8 casserole dish. Top evenly with bread slices and then cover evenly with Swiss cheese slices.

  • Place casserole dish into oven and let bake until cheese is melted and bubbly and beginning to brown, about 10-15 minutes. Serve immediately.

Nutrition

Serving: 1.5 cupsCalories: 237 kcal (12%)Carbohydrates: 29 g (10%)Protein: 11 g (22%)Fat: 5 g (8%)Fiber: 3 g (13%)

Course: Main Course Recipes

Cuisine: French Recipes

Diet: Low Calorie Recipes, Low Fat Recipes, Vegetarian Recipes

Main Ingredient: Vegetable Recipes

Category: Casserole Recipes

Tried this recipe?Let me know how it was!

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20 Comments

  1. barb9 years ago

    Followed exact directions. No problem with extra soup. This is Great! Thanks.

  2. Sarah11 years ago

    About to assemble – but my onions seem like they’re too “soupy”. How much liquid should be in the onion mixture?

  3. Gail11 years ago

    How does this make 4 servings of 1-1/2 cups each with only 1-1/2 cups total liquid?

  4. Dana11 years ago

    Got very excited coming across this recipe only to find out it’s not actually vegetarian. I’m sure that vegetable broth would not make this taste the same.

  5. Chriseda Howard11 years ago

    I just wanted you to know that I made this for my husband and myself this week and we both loved it. Thank you so much for the tip about using some broth to keep the onions from sticking to the pot, that was a real issue for me.

  6. Heather Mathieson11 years ago

    Considering I cook for 1… how well do you think this would keep/reheat??

  7. Gigi11 years ago

    I made this tonight and it was very tasty. I wouldn’t call it a casserole it was too soupy, We ate it as a soup… I followed the directions exactly,

  8. Rebecca O'Malley11 years ago

    this sounds great. do you think you could make the soup mixture ahead of time and refrigerate then just heat up with bread, cheese, etc later?

    • laaloosh11 years ago

      Sounds like a good idea! I think it should work fine….

  9. KatieQ11 years ago

    This casserole should not be classified as vegetarian because it is made with beef broth and Worcestershire sauce which contains anchovies..

    • Beth Baker11 years ago

      Easily remedied by subbing beef flavored veggie broth and anchovy free worcestershire …….but the last bottle of Worcestershire I picked up – no longer listed anchovies in the ingredients.

  10. Steph11 years ago

    Caramelize onions for 30-40 minutes?

    • laaloosh11 years ago

      Yes.

    • k l11 years ago

      they are wonderful.

    • Cate9 years ago

      That is what makes it so yummy!!!!!. I always cook them slow on low heat, but this is the best recipie I have found. I dont have the individual crocks and it still taste the same!

  11. Michelle Englehart Miller11 years ago

    Sounds delish, but to clarify, you’d have to use veg broth for this to be vegetarian.

  12. Just One Boomer (Suzanne)11 years ago

    Perfect for winter comfort food for those of us up in the northeast blue states.

  13. Elizabeth @ Food Ramblings11 years ago

    making it this weekend!!!

  14. Judy@lifeonthefoodchain.com11 years ago

    This is pure genius! If it wasn’t 8 AM I’d run and make it now…it may be on tonights dinner menu, though. Looks delish.

Food Recipes

French Onion Soup Casserole Recipe | LaaLoosh (2024)

FAQs

What is the difference between onion soup and French onion soup? ›

What is the Difference Between Onion Soup and French Onion Soup? French onion soup is always made with beef stock. Other onion soups can be made with chicken, vegetable, or beef stock. Additionally, French onion soup typically contains wine or sherry, which isn't typical or necessary in other onion soups.

How do you add depth to French onion soup? ›

A few sprigs of thyme and a bay leaf elevate the soup even more, but I take it a step further, adding a splash of fish sauce for complexity and depth—don't worry, it won't taste fishy—and a hit of cider vinegar to balance some of that oniony sweetness.

Should you cook onions before putting in casserole? ›

To prevent a soupy casserole, be sure to fully thaw any frozen vegetables in a colander over a bowl, and pat dry, squeeze excess moisture out of greens like spinach or chard, and quickly precook watery fresh vegetables like onions, mushrooms or squashes just until they release their moisture.

What broth is French onion soup made of? ›

What Is French Onion Soup? French onion soup, or soupe à l'oignon gratinée, is a classic French dish made with caramelized onions and beef stock or broth. The soup is topped with bread and cheese, then gratinéed to rich, gooey perfection. It's traditionally served in a ramekin or a ceramic crock with a handle.

Why is French onion soup so expensive? ›

First, French onion soup calls for a ton of onions. While onions aren't expensive, there's a lot of labor involved in halving, peeling, and slicing 10, 12, 50, or one billion onions (I don't know how much soup you make).

Why does French onion soup taste so good? ›

French onion soup is the ultimate comfort food. Onions get slowly cooked until sweet and caramelized, then simmered in rich broth until they're practically falling apart. To finish it off, toasted bread is added to give it that lovable crisp-gone-soggy texture and a generous amount of Gruyère cheese is melted on top.

Should French onion soup be thick or thin? ›

Made slightly thicker than most watered down soups because every mouthful NEEDS a slightly thickened texture to compliment the caramelized onions.

How to doctor up canned French onion soup? ›

Infusing the soup with a richer taste is as easy as quickly sauteing crushed garlic before pouring the soup in. Some soft, buttery garlic sauteed in earthy olive oil is the perfect addition to enrich canned French onion soup.

Why do you add flour to French onion soup? ›

Onion soup, at its very essence, is nothing more than onions and water boiled together. Period, done, finished, everything added from that point on is pure opinion. Caramelizing the onions brings out sugars, and makes a more luxurious silky and sweet soup, adding flour gently thickens and provides body.

Which onions are best for casseroles? ›

Yellow onions are perfect for stews, soups, barbecues, roasts and sauces. Avoid eating them raw as they have a strong flavour.

Should celery be sauteed before adding to soup? ›

While certain vegetables can work just fine added directly to simmering soups and stews (say, carrots and celery), other vegetables (onions, garlic, and the like) will almost always need at least a brief sweat in a fat-based liquid before adding the remaining ingredients.

How do you deepen the flavor of French onion soup? ›

My personal go-tos include worcestershire sauce, fish sauce, and brandy. Each deepens the flavor of french onion soup. Balsamic vinegar and soy sauce are other great options.

What cheese can I use instead of gruyère in French onion soup? ›

While it is essentially the same as Gruyère, the caramel notes in the younger cheese complements the onions and the nuttiness brings another depth to the stock. Read why cheesemongers favor Comté. No matter what, you should make some soup. It's never out of season.

Is French onion soup just called onion soup in France? ›

I'm told that French Onion Soup is called just “onion soup” in France, but to more accurately describe what we have come to know is called Soupe à l'Oignon Gratinée. Gratin is a culinary technique in which an ingredient is topped with a browned crust, often using breadcrumbs, grated cheese, egg or butter.

What are the two types of soups in French? ›

Traditionally, french soups are classified into two groups: clear soups and thick soups. The established French classifications of clear soups are bouillon and consommé.

Why did Panera change their French onion soup? ›

Panera Bread is working to regain customers' loyalty in 2020 with the reintroduction of its fan-favorite French Onion Soup. 2019 was a year of food news for Panera, not all of it positive. First, it removed the French Onion Soup, a staple on the menu for over 20 years, to make room for seasonal menu items in June.

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