Classic Slow Cooker Onion Soup
A timeless French onion soup recipe that is rich in flavor with caramelized onions and a savory broth, perfect for a cozy meal.
Prep time: 30 minutesCook time: 8 hoursServes: 6
Ingredients
4 lbs yellow onions, thinly sliced
2 tbsp unsalted butter
1 tbsp olive oil
2 tsp salt
1/2 tsp sugar
1/2 cup dry white wine
8 cups beef stock
2 bay leaves
1/4 tsp dried thyme
Salt and pepper to taste
1 baguette, sliced
8 oz Gruyère cheese, grated
Instructions
1. Heat butter and olive oil in a skillet over medium heat.
2. Add onions, salt, and sugar; cook until caramelized, about 30 minutes.
3. Deglaze with white wine, then transfer onions to slow cooker.
4. Add beef stock, bay leaves, and thyme to slow cooker.
5. Cook on low for 6-8 hours.
6. Season with salt and pepper to taste.
7. Toast baguette slices and top with Gruyère cheese.
8. Ladle soup into bowls and top with cheesy baguette.
Storage
Store leftover soup in an airtight container in the refrigerator for up to 3 days.
Reheating
Reheat soup gently on the stove over low heat until warmed through.
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This recipe is for informational purposes only. Always follow proper food safety practices, cook foods to safe internal temperatures, and store leftovers appropriately. Results may vary.
