If you’re a fan of the traditional patty melt—juicy beef, caramelized onions, and melted cheese between buttery slices of bread—then you’re going to love this Patty Melt Casserole. This recipe takes all the elements of the diner classic and transforms it into an easy-to-make, hearty casserole. It’s perfect for feeding a crowd or enjoying leftovers the next day.
Ingredients:
- 1 ½ lbs ground beef
- 2 large onions, thinly sliced
- 2 tablespoons butter
- 2 tablespoons olive oil
- 1 tablespoon Worcestershire sauce
- 1 tablespoon Dijon mustard
- 1 teaspoon garlic powder
- 1 teaspoon onion powder
- Salt and black pepper, to taste
- 8 slices of rye bread, cubed
- 2 cups shredded Swiss cheese (or a mix of Swiss and cheddar)
- 1 ½ cups beef broth
- 1 cup milk
- 3 large eggs
- 2 tablespoons mayonnaise (optional, for extra creaminess)
- Butter, for greasing the dish