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Easy French Onion Beef Casserole

Easy French Onion Beef Casserole

Cozy beef and noodles baked in a creamy French onion sauce, finished with melty cheese and crunchy fried onions. A weeknight-friendly casserole with classic bistro flavors.
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Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Servings: 6

Ingredients
 

Main Ingredients

  • 1 tbsp olive oil for browning
  • 1.25 lb ground beef 85–90% lean
  • 8 oz wide egg noodles, dry
  • 10.5 oz condensed French onion soup
  • 10.5 oz condensed cream of mushroom soup
  • 0.5 cup beef broth
  • 0.75 cup sour cream room temperature if possible
  • 1 tbsp Worcestershire sauce
  • 1 tsp garlic powder
  • 1 tsp onion powder
  • 0.5 tsp dried thyme
  • 0.75 tsp kosher salt adjust to taste
  • 0.5 tsp ground black pepper
  • 1.5 cup shredded Swiss or provolone or a mix
  • 1.25 cup crispy fried onions

Instructions

Preparation Steps

  • Preheat oven to 350°F. Grease a 9x13-inch baking dish.
  • Boil noodles in salted water until just tender, 5–6 minutes. Drain.
  • Warm oil in a large skillet over medium-high heat.
  • Add beef; cook, breaking it up, until browned. Drain excess fat.
  • Season with salt, pepper, garlic powder, onion powder, and thyme. Cook 1 minute.
  • Stir in both soups, beef broth, and Worcestershire. Simmer 3–4 minutes until slightly thickened.
  • Remove from heat; fold in sour cream and half the cheese.
  • Toss in noodles to coat evenly, then spread mixture in the baking dish.
  • Top with remaining cheese and most of the fried onions.
  • Bake 15 minutes. Add remaining onions; bake 5 minutes more until bubbly and golden.
  • Rest 5 minutes before serving.

Notes

Variation: Swap egg noodles for cooked rice or small pasta shapes. Try Gruyère for a deeper, nutty melt. Stir in sautéed mushrooms for extra savoriness.
Make-ahead tip: Assemble up to 24 hours in advance; cover and refrigerate. Bake covered 10 minutes, then uncover and finish as directed.
Storage: Refrigerate leftovers in an airtight container up to 3 days; reheat covered at 325°F until warmed through.
This recipe is an original creation inspired by classic Easy French Onion Beef Casserole flavors. All ingredient ratios and instructions are independently developed.