Introduction

The Mushroom and Swiss Burger Casserole is a comforting twist on a classic burger, combining savory ground beef with earthy mushrooms and melted Swiss cheese. This hearty casserole is perfect for a family dinner or meal prep, offering rich flavors in every bite.

The image shows a creamy mushroom casserole in a white baking dish, with one corner scooped out. The dish has about three visible layers: a bottom cream layer, a middle layer filled with sautéed brown mushrooms mixed into the creamy sauce, and a top layer of melted golden-browned cheese with mushroom slices and small green parsley leaves scattered across. The cheese is bubbly and slightly browned in spots. The background features a white marbled texture, and whole raw mushrooms are blurred in the background. Photo taken with an iphone --ar 4:5 --v 7

Ingredients

1 lb Ground Beef (can be swapped for ground turkey, chicken, or plant-based meat)
1 Onion (yellow onion or shallots work well as substitutes)
8 oz Mushrooms (crimini or button mushrooms can be used interchangeably)
3 cloves Garlic (use fresh garlic for best results)
1 cup Beef Broth (chicken broth can be used for a lighter flavor)
1 tbsp Worcestershire Sauce (essential for a savory kick)
2 tbsp Soy Sauce (adjust quantity for lower sodium versions)
1 tbsp Dijon Mustard (complements the rich flavors)
6 oz Swiss Cheese (cheddar, mozzarella, or any melty cheese can be used as alternatives)
1 cup Sour Cream (Greek yogurt can be used as a healthier option)
4 pieces Hamburger Buns (gluten-free buns can be used for a gluten-free version)
2 tbsp Olive Oil (adds richness to the dish)
Salt to taste (essential for seasoning)
Pepper to taste (essential for seasoning)
1 tbsp Fresh Parsley (optional garnish for freshness and color)

Instructions

Step 1: Preheat your oven to 350°F (175°C) to ensure it’s hot and ready for baking.
Step 2: Heat olive oil in a large skillet over medium heat. Add the ground beef, breaking it up with a spatula, and cook until browned and cooked through, about 5-7 minutes. Season with salt and pepper, then remove and set aside.
Step 3: In the same skillet, cook the onions and mushrooms until softened, about 5-7 minutes. Add the minced garlic and sauté for another minute until fragrant.
Step 4: Return the cooked beef to the skillet. Stir in Worcestershire sauce, soy sauce, Dijon mustard, and beef broth. Let the mixture simmer for 5 minutes, then remove from heat and fold in the sour cream.
Step 5: Cube the hamburger buns and spread them evenly in the bottom of a casserole dish. Pour the beef and mushroom mixture over the bread cubes.
Step 6: Sprinkle the shredded Swiss cheese on top of the casserole evenly.
Step 7: Bake in the preheated oven for 25-30 minutes until the cheese is melted and golden brown.
Step 8: Remove from oven and garnish with fresh parsley before serving.

Tips & Variations

For a lighter version, substitute ground turkey and use Greek yogurt instead of sour cream.
Try different cheeses like cheddar or mozzarella for a change of flavor and texture.
Use gluten-free buns to make this casserole suitable for gluten-sensitive diets.
Add a pinch of smoked paprika or chili flakes to the beef mixture for extra depth and a subtle kick.
If you prefer a creamier casserole, mix additional sour cream or cream cheese into the beef mixture before baking.

Storage

Store any leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, cover the casserole with foil and warm in a 350°F (175°C) oven until heated through, about 15-20 minutes. Microwave reheating is also possible but may result in less evenly melted cheese.

How to Serve

A white ceramic baking dish filled with a creamy mushroom casserole is shown. The dish has a golden-brown top layer of melted cheese with bubbly, slightly browned edges, dotted with halved mushrooms that have a brown and beige color. Underneath the cheesy layer, there is a light beige sauce mixed with finely chopped mushrooms. Fresh green parsley leaves are scattered on top, adding a touch of color. The dish sits on a white marbled surface with whole white mushrooms blurred in the background. Photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use other types of mushrooms in this casserole?

Yes, you can use crimini, button, portobello, or any mushrooms you prefer. Different types will add varying textures and flavors, but all work well in this dish.

Is it possible to make this casserole vegetarian?

Absolutely. Substitute the ground beef with plant-based meat alternatives or cooked lentils for protein. Use vegetable broth instead of beef broth to keep it vegetarian-friendly.