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Savory French onion beef casserole topped with melted cheese and caramelized onions.

Savory French Onion and Beef Casserole

A family-friendly dish that combines rich flavors reminiscent of French onion soup with ground beef and cheesiness, perfect for gatherings.
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Course Dinner, Main Course
Cuisine American
Servings 6 servings
Calories 550 kcal

Ingredients
  

Main Ingredients

  • 10 oz wide egg noodles Delightful texture that holds onto the rich sauce.
  • 1 tablespoon olive oil Creates a luscious base while adding flavor.
  • 1.5 lb ground beef, 85 percent lean Provides hearty flavor.
  • 2 medium yellow onions, thinly sliced Adds sweetness when caramelized.
  • 8 oz cremini mushrooms, sliced Provides depth and umami.
  • 3 cloves garlic, minced Enhances the dish's flavor.
  • 1 teaspoon fresh thyme leaves Or use 1/2 teaspoon dried thyme.
  • 1 teaspoon Worcestershire sauce Deepens the flavors.
  • 1 can (10.5 oz) condensed French onion soup Brings classic soup essence to the casserole.
  • 3/4 cup beef broth For added moisture and richness.
  • 3/4 cup sour cream Contributes creaminess.
  • 1/2 teaspoon kosher salt Enhances natural flavors.
  • 1/2 teaspoon black pepper Adds a mild kick.
  • 1.5 cups shredded Swiss cheese or Gruyere For a melty topping.
  • 1 cup crispy fried onions Adds a delightful crunch.
  • 2 tablespoons chopped fresh parsley (optional) For color and freshness.

Instructions
 

Preparation

  • Preheat the oven to 375°F (190°C).
  • Boil the wide egg noodles in salted water per package instructions, stopping one minute shy of the recommended time, then drain.
  • In a large skillet, heat olive oil over medium-high heat and brown the ground beef for 6-8 minutes until no pink remains.
  • Add the sliced onions and mushrooms, sauté for 8-10 minutes until onions are softened and translucent.
  • Stir in minced garlic, thyme, Worcestershire sauce, French onion soup, beef broth, sour cream, salt, and pepper. Mix until creamy.
  • Fold the drained egg noodles into the mixture until evenly coated.
  • Transfer the mixture into a greased 9x13-inch baking dish and spread evenly.
  • Sprinkle the shredded cheese over the top.
  • Bake uncovered for 15 minutes until edges are bubbling and cheese is melted.
  • Garnish with crispy fried onions and bake for an additional 5-8 minutes until golden brown.
  • Let the casserole rest for 5 minutes before serving, optionally garnishing with parsley.

Notes

This casserole is ideal for family dinners or potlucks. Pair with a salad or crusty bread. Watch out for common mistakes like overcooking noodles or rushing the onion caramelization.
Keyword Beef Casserole, Casserole, Comfort Food, Easy Recipe, French Onion Soup