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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: Wed, 05 Nov 2025 19:14:51 GMT
Nutrition balance score
Unbalanced
Glycemic Index
34
Low
Glycemic Load
8
Low
Nutrition per serving
Calories196.1 kcal (10%)
Total Fat8.8 g (13%)
Carbs21.5 g (8%)
Sugars10.6 g (12%)
Protein7.9 g (16%)
Sodium1266.5 mg (63%)
Fiber2.9 g (10%)
% 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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