French Onion Casserole

Total Time

Prep/Total Time: 30 min.


8 servings

Updated: Feb. 15, 2022
Fans of French onion soup will gobble up this comforting casserole. The 30-minute side dish would be a nice accompaniment to beef entrees.—Margaret McClatchey, Loveland, Colorado
French Onion Casserole Recipe photo by Taste of Home


  • 8 medium onions, sliced
  • 5 tablespoons butter, divided
  • 2 tablespoons all-purpose flour
  • Dash pepper
  • 3/4 cup beef broth
  • 1/4 cup sherry or additional beef broth
  • 1-1/2 cups salad croutons
  • 1/2 cup shredded Swiss cheese
  • 3 tablespoons grated Parmesan cheese


  1. In a large cast-iron or other ovenproof skillet, saute onions in 3 tablespoons butter until tender. Stir in flour and pepper until blended; gradually add broth and sherry. Bring to a boil; cook and stir until thickened, about 2 minutes.
  2. In a microwave, melt remaining butter. Add croutons; toss to coat. Spoon over onion mixture. Sprinkle with cheeses.
  3. Broil 3-4 in. from the heat until cheese is melted, 1-2 minutes.

Nutrition Facts

1/2 cup: 205 calories, 11g fat (6g saturated fat), 27mg cholesterol, 279mg sodium, 21g carbohydrate (10g sugars, 3g fiber), 6g protein.