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By thekitchn.com
How To Make French Onion Soup in the Slow Cooker
Here's a step-by-step recipe for blissfully delicious French onion soup made from start to finish in the slow cooker.
Updated at: Fri, 06 Nov 2026 17:43:49 GMT
Nutrition balance score
Unbalanced
Glycemic Index
35
Low
Glycemic Load
8
Low
Nutrition per serving
Calories201.8 kcal (10%)
Total Fat9 g (13%)
Carbs22 g (8%)
Sugars10.9 g (12%)
Protein8.2 g (16%)
Sodium1111.7 mg (56%)
Fiber3.3 g (12%)
% Daily Values based on a 2,000 calorie diet
Ingredients
8 servings
3 poundsyellow onions
peeled, sliced, and cut into quarter-moons
2 tablespoonsunsalted butter
melted
2 tablespoonsolive oil
2 teaspoonskosher salt
plus more as needed
freshly ground black pepper
10 cupsreduced-sodium beef broth
2 tablespoonsbalsamic vinegar
3 tablespoonsbrandy
optional
4baguette slices
toasted, per bowl
⅓ cupGruyère cheese
grated, per bowl, 1 1/3 to 2 cups
shallot
Chopped, or fresh onion, optional
Instructions
View on thekitchn.com
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