Slow Cooker French Onion Soup | Recipe Cart | Recipe Cart

Ingredients

• 1/4 cup unsalted butter
• 6 thyme sprigs
• 1 bay leaf
• 5 pounds large sweet onions, vertically sliced (about 16 cups)
• 1 tablespoon sugar
• 6 cups unsalted beef stock (such as Swanson)
• 2 tablespoons red wine vinegar
• 1 1/2 teaspoons kosher salt
• 1 teaspoon black pepper
• 24 (1/2-ounce) slices whole-grain French bread baguette
• 5 ounces Gruyère cheese, shredded (about 1 1/4 cups)