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Slow Cooker French Onion Soup Recipe

Slow Cooker French Onion Soup Recipe

It's hard to believe something this delightful came from a slow cooker! Topped with a slice of French bread and provolone cheese, individual servings of this French onion soup are sure to be enjoyed by everyone at your dinner table. —Kris Ritter, Pittsburgh, Pennsylvania
TOTAL TIME: Prep: 15 min. Cook: 8 hours YIELD:4 servings


  • 2 large sweet onions, thinly sliced (about 4 cups)
  • 1/4 cup butter, cubed
  • 2 cans (14-1/2 ounces each) beef broth
  • 2 tablespoons sherry or additional beef broth
  • 1/2 teaspoon pepper
  • 4 slices French bread (1/2 inch thick), toasted
  • 4 slices provolone cheese


  • 1. Place onions and butter in a 1-1/2-qt. slow cooker coated with cooking spray. Cover and cook on low for 6 hours or until onions are tender. Stir in the broth, sherry and pepper. Cover and cook 2-3 hours longer or until heated through.
  • 2. Ladle soup into ovenproof bowls. Top each with a slice of toast and cheese. Broil 4-6 in. from the heat for 2-3 minutes or until cheese is melted. Serve immediately. Yield: 4 servings.

Nutritional Facts

1 cup equals 267 calories, 20 g fat (12 g saturated fat), 50 mg cholesterol, 1,324 mg sodium, 10 g carbohydrate, 1 g fiber, 11 g protein.

Reviews for Slow Cooker French Onion Soup

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Reviewed Nov. 24, 2015

"This soup is absolutely wonderful. I only had 1 sweet onion so I added a red onion. That is the only change. My husband will ask for this often!"

Reviewed Nov. 23, 2014

"I just made this tonight. My first time making French Onion soup. It was easy and really really delicious. I used a box of Trader Joe's beef broth instead of canned. I added a bay leaf, and 1 tsp of beef granules. Everything else was exactly the same. (I did cook the onions on the stove to save time, and then put them in the crockpot with the broth. I will definitely make again. Hubby loved it too."

Reviewed Mar. 23, 2014

"I smashed this recipe together with another one to make a great French onion soup. Caramelized the onions in a pan first. Added 1 can of progresso French onion soup, 1 can Campbells consommé, 1 teaspoon of better than bouillon beef flavor, lawrys, parsley, garlic, salt, bay leaf. Those extra ingredients only take a minute to add and gives it a depth of flavor it needs. I triple the recipe, we love it."

Reviewed Feb. 22, 2014

"I have made this several times and it's great! My boyfriend says it's the best he has ever had. It's our favorite soup!"

Reviewed Nov. 16, 2013

"Made this recipe and once I tasted it I wished I didn't have to share..."

Reviewed Sep. 25, 2013

"This was lacking something. Maybe it's the brand of beef broth that I used. I think next time I might even use a can of condensed French onion soup instead of just beef broth. I really loved how the slow cooker began to caramelize the onions. I let them cook almost two hours longer to give them a nice golden color. Like BobbiBacha, I, too, was coming down with something, and ate this and woke up this morning feeling great!"

Reviewed Mar. 14, 2013

"I would give this recipe another try since I wasn't able to follow the instructions to the letter the first time. We were going to be gone all day so I dumped everything in the crockpot all at once. It was okay, but I'm sure it would have been better if the onions had caramelized."

Reviewed Jan. 26, 2013

"I love this had a cold and did cooked this I feel better"

Reviewed Mar. 20, 2011

"I have made this soup many times and I absolutely love it! There is never any left over even with doubling the recipe!!"

Reviewed Jan. 25, 2011

"This soup was amazing. My husband loves French Onion Soup and he raved about this recipe and it was so easy to make. Love it!"

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