Foodista | Recipes, Cooking Tips, and Food News | French Onion Marsala Soup

Ingredients

• 1/4 cup butter
• 2 tablespoons olive oil
• 4 cups onions, sliced
• 3 (14 oz) cans beef broth
• 1/2 cup marsala wine
• 1 teaspoon dried thyme
• salt and pepper to taste
• 2 heaping tbsp sugar
• 2 bags Texas Toast croutons
• 8 slices provolone cheese
• 2 slices Swiss cheese, diced
• 1/4 cup grated Parmesan cheese