When the weather turns rainy and chilly, few meals feel as comforting as a warm bowl of French onion soup. This slow cooker French onion soup recipe keeps the process simple while still giving you the classic flavor of tender onions, rich beef broth, toasted bread, and melted provolone cheese. It is a cozy, hands-off recipe that works well for lunch, dinner, or a relaxed weekend meal.
The slow cooker makes this recipe especially easy. Instead of standing at the stove for a long time, the onions cook slowly with butter until they become soft and flavorful. After that, beef broth and pepper are added, and the soup continues cooking until everything is hot and ready to serve. The final touch is what makes French onion soup so satisfying: each bowl is topped with toasted French bread and a slice of provolone cheese, then broiled until the cheese melts beautifully over the top.
Slow Cooker French Onion Soup
This homemade slow cooker French onion soup is a simple comfort food recipe made with sliced sweet onion, butter, beef broth, pepper, toasted French bread, and provolone cheese. It is ideal when you want something warm and savory without complicated preparation. The recipe makes four servings and uses a small slow cooker, making it a great choice for a smaller household or an easy starter before a larger meal.
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Ingredients
- 1 large sweet onion, thinly sliced about 4 cups
- 1/4 cup butter, cubed
- 2 cans beef broth 14 ounces each
- 1/2 tsp pepper
- 4 slices French bread 1/2 inch thick, toasted
- 4 slices provolone cheese
Instructions
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Coat a 1 1/2-quart slow cooker with cooking spray. Add the sliced onion and cubed butter.
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Cover and cook on low for 6 hours, or until the onion is tender.
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Stir in the beef broth and pepper.
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Cover again and cook for 2 more hours, or until the soup is heated through.
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Ladle the soup into ovenproof bowls. Top each bowl with one slice of toasted French bread and one slice of provolone cheese. Broil 4 to 6 inches from the heat for 2 to 3 minutes, or until the cheese is melted. Serve warm.
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Tips for the Best Slow Cooker French Onion Soup
For the best texture, slice the onion thinly so it softens evenly during the long cooking time. A sweet onion works nicely in this recipe because it becomes mellow as it cooks with the butter. Since the ingredient list is short, each component matters. Use the beef broth and pepper as written, then allow the slow cooker enough time to gently develop the soup’s flavor.
Make sure the bread is toasted before placing it on top of the soup. Toasted French bread holds up better under the melted cheese and gives each serving that classic French onion soup finish. Ovenproof bowls are important for the broiling step, because the cheese needs direct heat to melt properly. Keep an eye on the bowls while they broil, as the cheese can melt quickly.
Serving Suggestions
This crock pot French onion soup is hearty enough to enjoy on its own, but it can also be served with a simple salad or alongside a sandwich for a more filling meal. It is especially welcome on cool evenings, rainy days, or anytime you want a warm bowl of homemade soup without spending a lot of time in the kitchen. The slow cooker does most of the work, and the broiled cheese topping makes the finished dish feel extra comforting.
