Ingredients

The following ingredients have 4 Servings
  • 2 tablespoons olive oil
  • 2 tablespoons unsalted butter
  • 4 large yellow onions, (thinly sliced (approximately 4 cups))
  • ½ teaspoon kosher salt
  • ½ teaspoon black pepper
  • ½ teaspoon garlic powder
  • 32 ounces (960g) beef broth
  • 2 tablespoons Worcestershire sauce
  • 30-35 homemade croutons, (or store-bought, divided)
  • ¼ cup (25g) parmesan cheese, (grated, divided)
  • 6 slices provolone cheese, (divided)
  • parsley, (for garnish)

Instruction

  • In a medium pot over medium heat, add oil and butter. After the butter has melted, add onions and saute for 25-30 minutes, stirring occasionally, until very tender and brown caramel color.
  • Add salt, pepper, and garlic powder. Stir to combine.
  • Add beef broth and Worcestershire sauce. Bring to a simmer. Reduce heat to low and cover for 10 minutes.
  • Arrange the oven rack to the top middle position. Preheat the broiler and prepare a baking pan with 6 broiler-safe bowls.
  • Divide the soup into each of the 6 bowls. Top each bowl with 6-7 homemade croutons, 1 heaping teaspoon of parmesan, and 1 slice of provolone cheese.
  • Place the bowls of soup under the broiler for 2-3 minutes, or until the cheese bubbles and browns.
  • Cool slightly before serving. Top with parsley for garnish.