Delicious Slow Cooker French Onion Soup Recipe

Ingredients

• 6 large yellow onions, thinly sliced
• 4 tablespoons butter
• 2 tablespoons olive oil
• 2 teaspoons sugar
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 2 cloves garlic, minced
• 1/2 cup dry white wine
• 8 cups beef broth
• 2 sprigs fresh thyme
• 1 bay leaf
• 1 French baguette, sliced
• 2 cups grated Gruyere cheese