Crockpot French Onion Soup

Here's the Dish

I don’t know about you, but when it comes to soup, nothing is better to me than a good french onion soup on a chilly day! The key to a good french onion soup is caramelizing the onions to bring out the natural sweetness! Slow cook the onions in a good broth, and add a layer of bubbly melted cheese, and you have yourself the perfect bowl of french onion soup that is bursting with flavor! 


The estimated total time to make this recipe is 4-8 hours.


Spray a large pan with nonstick cooking spray. Add onions and 1 cup beef broth and garlic powder. Sautee onions until broth is completely evaporated, and onions begin to caramelize. 


Add the rest of the ingredients (except for the parmesan and swiss cheese) to the crockpot and add onions. Turn crockpot on high for 4 hours, or on low for 8 hours, or overnight. 


When ready to serve, sprinkle parmesan cheese in the soup, and ladle soup into an oven (or microwave safe) bowl, and add a piece of swiss cheese on top. Place in oven preheated to low broil and place soup in oven to melt the cheese. Leave in oven for 1-3 minutes, or until cheese is lightly golden brown. Alternatively, you could microwave the soup for 1-3 minutes, or until the cheese is melty! Enjoy!


2 Large yellow onions, peeled and thinly sliced
1/2 tsp Garlic powder
2 pkts Stevia or 1 tbs sugar substitute of choice
8 cups (2-32oz containers) Organic beef broth
4 tbsGrated parmesan cheese
8 Slices ultra thin swiss cheese
1/2 tspDried thyme
2 tbsBalsamic vinegar or worcestershire Sauce
PinchSalt and Pepper (or to taste)

Nutrition Breakdown

8 1 1/2 cup Servings (Makes 12 cups total)
70 Calories
4 g Fat
1 g Carbohydrate
0 g Fiber
0 g Sugar
7 g Protein
2 WWP+*

*Weight Watchers Points per serving


suzanne said:

So the parmesan cheese is cooked in with the broth or is it put on top?

October 24th, 2012 — 10:01am  |  Reply

Dashing Dish said:

cooked with the broth…or on top either way however you perfer

October 24th, 2012 — 2:49pm  | 

Megan @ MegGoesNomNom said:

Wow, this looks so tasty! I love French Onion Soup.

October 28th, 2012 — 1:52pm  |  Reply

Vicky Chae-Brown said:

Made it today and it was delicious! Thanks Katie!

October 30th, 2012 — 9:38pm  |  Reply

Tiffany Mascho said:

I made this today and it turned out pretty good. It’s a little sweeter than I would have liked but still really good.

November 3rd, 2012 — 6:24pm  |  Reply

Bridget said:

I just want to make sure before I make this tomorrow- the 1 cup of broth comes out of the 8 total cups so only 7 cups go in the crockpot? Or is the 1 cup that you use to caramelize the onions in addition to the 8 cups?

November 4th, 2012 — 9:00pm  |  Reply

Dashing Dish said:

yes to the first one :)

November 5th, 2012 — 9:09am  | 

Brian said:

So, to be certain, the 8 slices of Swiss don’t go into the crock pot with the rest of the ingredients, as step 2 would imply?

November 13th, 2012 — 1:08am  |  Reply

Dashing Dish said:


November 13th, 2012 — 10:34am  | 

lindsay said:

Hi! I love this! I am featuring it in a recipe collection here

December 13th, 2012 — 6:55pm  |  Reply

Erin said:

What would you recommend serving this with? Thanks! :)

December 27th, 2012 — 1:44am  |  Reply

Dashing Dish said:

I would serve it as a side with a meat such as chicken or fish

December 27th, 2012 — 10:09am  | 

Tahlia said:

Hi there. I am wondering if you ahve ever tried to freeze this and if so how.

December 31st, 2012 — 3:02pm  |  Reply

Dashing Dish said:

just put in a tupperwear and freeze :)

January 1st, 2013 — 10:38am  | 

Sarah Anderson said:

How long would you allow this to keep in the fridge? I made it Monday night and am just getting to eat it. :-)

February 27th, 2013 — 5:38pm  |  Reply

Dashing Dish said:

5-7 days :)

February 27th, 2013 — 5:56pm  | 

Erin said:

Hi- wondering if I cook this on the stove, instead– how long do you think it would need to be cooked for? Thanks in advance! :D

April 17th, 2013 — 5:03pm  |  Reply

Dashing Dish said:

30-45 minutes on medium low heat :)

April 17th, 2013 — 5:11pm  | 

Jan Paulson said:

I made this today and the next time I would leave the sugar out or cut in half. Maybe my onions were extra sweet and that is what I am tasting. I am having this for dinner and maybe it will taste better when there is cheese on top.
It is very easy to make…

April 25th, 2013 — 4:37pm  |  Reply

Ashley said:

Mozzarella cheese would work the same as swiss, correct?

June 13th, 2013 — 9:43pm  |  Reply

Briana said:

I used 32 oz of beef broth and 32 oz of vegetable stock

November 2nd, 2013 — 8:10pm  |  Reply

Meredith said:

This was delicious! Thank you for a quick and easy recipe!

December 13th, 2013 — 8:01pm  |  Reply

Amanda said:

Can I sautee the onions the night before? Or, I guess, how long does that process take?

December 15th, 2013 — 6:36pm  |  Reply

Dashing Dish said:

sure you dont have to, but you could!

December 16th, 2013 — 8:57am  | 

Marie inez said:

Made this today…. left out the sugar substitute….it was delicious!

January 5th, 2014 — 6:24pm  |  Reply

Fiona said:

Fantastic as usual! I used one stevia packet instead of 2. Thank you for making weight watchers an easier transition :)

January 9th, 2014 — 1:57pm  |  Reply

Nicole said:

This was AMAZING and so easy! I only used one packet of sugar substitute (equal). Seriously… DELICIOUS!!! Thank you! :-)

January 23rd, 2014 — 9:57pm  |  Reply

Debra Kalo said:

Want to make the french onion soup for a work functionand am just wondering if it would turn out if I add swiss cheese directly to the crock pot along with croutons?

April 27th, 2014 — 6:22pm  |  Reply

matt bannon said:

Just another amazing crock pot recipe–we did cheat and put sourdough bread in ours before we put on the cheese and cooking it in the oven. i think that was to get the real NJ diner feel to it, but incredible tastes all together. thanks again

September 29th, 2014 — 10:29am  |  Reply

Rachel said:

I’m in the market for a crockpot, what size is yours? Do you have any suggestions? Thank you! Love all your recipes!

November 14th, 2014 — 4:42pm  |  Reply

Dashing Dish said:

Thank you Rachel! :) I use a 6 qt stay or go slow cooker- I love it! :)

November 14th, 2014 — 6:07pm  | 

Shannon said:

I am not a fan of swiss cheese. Could I use another type of cheese?

January 30th, 2015 — 5:28pm  |  Reply

Dashing Dish said:


January 31st, 2015 — 7:37am  | 

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