Slow Cooker French Onion Soup

Ingredients

• Servings: 8
• 6 tablespoons butter
• 4 large yellow onions, sliced and separated into rings
• 1 tablespoon sugar
• 2 cloves garlic, minced
• 1/2 cup cooking sherry
• 7 cups reduced-sodium beef broth
• 1 teaspoon sea salt, or to taste
• 1/4 teaspoon dried thyme
• 1 bay leaf
• 8 slices of french bread
• 1/2 cup shredded gruyere cheese
• 1/3 cup shredded emmental cheese
• 1/4 cup freshly shredded parmesan cheese
• 2 tablespoons shredded mozzarella cheese

Recipe

Preparation Time: 30 mins Cook Time: 4 hrs 35 mins

Ready Time: 5 hrs 5 mins


• heat butter in a large, heavy pot over medium-high heat; cook and stir onions until they become translucent, about 10 minutes. sprinkle onions with sugar; reduce heat to medium. cook, stirring constantly, until onions are soft and browned, at least 30 minutes. stir in garlic and cook until fragrant, about 1 minute.
• stir sherry into onion mixture and scrape bottom of pot to dissolve small bits of browned food from the pot. transfer onions into a slow cooker and pour in beef broth. season to taste with sea salt; stir in thyme and bay leaf. cover cooker, set on high, and cook 4 to 6 hours. if desired, set on low and cook 8 to 10 hours.
• about 10 minutes before serving, set oven rack about 8 inches from the heat source and preheat the oven's broiler. arrange bread slices on a baking sheet.
• broil bread slices until toasted, 1 to 2 minutes per side.
• combine gruyere, emmental, parmesan, and mozzarella cheeses in a bowl, tossing lightly. fill oven-safe soup crocks 3/4 full of onion soup and float a bread slice in each bowl. top with about 2 tablespoons of cheese mixture per serving.
• place filled bowls onto a baking sheet and broil until cheese topping is lightly browned and bubbling, about 2 minutes.