Slow Cooker French Onion Soup
Warm up your evenings with this easy, comforting slow cooker French onion soup. Made with sweet caramelized onions, rich beef broth, and topped with crispy baguette and melted cheese, this soup is perfect for cozy nights, weeknight dinners, or meal prep.
Why You’ll Love This Slow Cooker French Onion Soup:
– Hands-off cooking: No constant stirring just let the crockpot work its magic.
– Deep, rich flavor: Sweet caramelized onions paired with savory beef broth for ultimate comfort.
– Versatile & freezer-friendly: Make ahead, freeze, and reheat for quick, hearty meals.
– Nutritious & satisfying: Packed with onions rich in antioxidants and fiber, paired with protein-rich cheese.
Ingredients:
– 3 pounds sweet onions, thinly sliced
– 3 tablespoons unsalted butter, melted
– 2 teaspoons brown sugar
– Kosher salt and freshly ground black pepper, to taste
– 6 sprigs fresh thyme
– 1 bay leaf
– 6 cups beef stock (or vegetable broth for a vegetarian option)
– 2 teaspoons sherry vinegar (or apple cider vinegar)
– 1 French baguette, sliced
– 1 cup shredded Gruyère cheese
– 1 cup shredded Asiago cheese
Equipment:
– 6-qt slow cooker
– Baking sheet
– Oven-safe ramekins or bowls
Instructions:
1. Place sliced onions into the slow cooker.
2. Add melted butter, brown sugar, and 1 teaspoon salt. Top with thyme and bay leaf. Cover and cook on high for 8–10 hours, or until onions are deeply caramelized.
3. Stir in beef stock and sherry vinegar; season with salt and pepper to taste. Cover and cook on high for 2–3 hours, until heated through. Discard thyme and bay leaf.
4. Preheat oven to broil. Arrange baguette slices on a baking sheet and broil until golden, 1–2 minutes per side.
5. Divide soup into ramekins or ovenproof bowls. Top with baguette slices and sprinkle with cheeses.
6. Broil until cheese melts and turns golden, about 2 minutes. Serve immediately.
Tips for Perfect French Onion Soup:
– Choose sweet onions: They caramelize beautifully and add natural sweetness.
– Quality broth matters: Use low-sodium or unsalted beef stock for the richest flavor.
– Cheese matters: Gruyère is classic, nutty, and melts perfectly; substitute Swiss or Fontina if needed.
– Freeze smart: Freeze without bread and cheese up to 3 months. Thaw overnight and reheat before adding toppings.
Serving Suggestions:
Pair your slow cooker French onion soup with:
– Italian chopped salad
– Garlic Parmesan roasted broccoli
– Roasted sweet potatoes
– Chicken Caesar salad with homemade croutons
Benefits of French Onion Soup:
– Antioxidant-rich onions: Support immune health and reduce inflammation.
– Protein-packed cheese: Helps keep you full and satisfied.
– Low-maintenance cooking: Saves time and effort without sacrificing flavor.
– Versatile meal prep: Perfect for batch cooking, leftovers, and freezer storage.
Warm up with this easy Slow Cooker French Onion Soup! Made with caramelized sweet onions, savory beef broth, and melted Gruyère cheese. Perfect cozy dinner for chilly nights.
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