Cheesy Steak Casserole

Satisfy your comfort food cravings with this Cheesy Steak Casserole, a hearty and irresistibly creamy dish that’s perfect for cozy family dinners. Tender slices of seared sirloin steak are paired with sautéed onions, garlic, and mushrooms, then layered with thinly sliced russet potatoes and a rich homemade cheese sauce made with cheddar and mozzarella. This oven-baked casserole is a symphony of textures and flavors, with golden, bubbly cheese crowning every bite. Ideal for meal prepping or feeding a crowd, this recipe combines indulgence and ease with just 20 minutes of prep time. Whether you’re looking to impress guests or treat yourself to a comforting classic, this Cheesy Steak Casserole is a foolproof winner for any occasion.

Nutriscore Rating: 64/100

Prep Time:20 mins

Cook Time:45 mins

Total Time:65 mins

Servings: 6

Ingredients

• 1 lb sirloin steak
• 2 tbsp olive oil
• 1 medium onion, diced
• 3 cloves garlic cloves, minced
• 8 oz mushrooms, sliced
• 3 medium russet potatoes, thinly sliced
• 4 tbsp unsalted butter
• 3 tbsp all-purpose flour
• 2 cups milk
• 2 cups shredded cheddar cheese
• 1 cup shredded mozzarella cheese
• 1 tsp dried parsley
• 1 tsp salt
• 0.5 tsp ground black pepper

Directions

Step 1

Preheat your oven to 375°F (190°C) and lightly grease a 9x13-inch casserole dish.

Step 2

Heat 1 tablespoon of olive oil in a large skillet over medium-high heat. Season the steak with salt and pepper, then sear for 2-3 minutes per side until browned. Remove the steak from the pan, let it rest for 5 minutes, and slice it into thin strips.

Step 3

In the same skillet, add the remaining olive oil and sauté the diced onion and minced garlic for 2-3 minutes until softened.

Step 4

Add the sliced mushrooms to the skillet and cook for another 5 minutes until they release their moisture and start to brown. Remove the vegetable mixture from the skillet and set aside.

Step 5

In a medium saucepan, melt the butter over medium heat. Whisk in the flour and cook for 1-2 minutes to form a roux. Gradually whisk in the milk, ensuring no lumps form. Continue stirring until the mixture thickens, about 4-5 minutes.

Step 6

Remove the saucepan from heat and stir in 1 1/2 cups of shredded cheddar cheese, 1/2 cup of mozzarella cheese, and the dried parsley. Mix until smooth and creamy. Adjust seasoning with salt and pepper if necessary.

Step 7

Layer half of the thinly sliced potatoes in the bottom of the prepared casserole dish. Top with half of the sautéed vegetable mixture, half of the steak slices, and half of the cheese sauce. Repeat the layers with the remaining ingredients.

Step 8

Sprinkle the remaining shredded cheddar cheese and mozzarella cheese evenly over the top of the casserole.

Step 9

Cover the dish with aluminum foil and bake for 30 minutes. Remove the foil and bake for an additional 15 minutes, or until the top is golden and bubbly.

Step 10

Let the casserole rest for 5-10 minutes before serving. Enjoy your cheesy steak casserole!

Nutrition Facts

Serving size	(2369.5g)

Amount per serving	% Daily Value*
Calories	3801.2

Total Fat 235.9g	0%
Saturated Fat 120.7g	0%
Polyunsaturated Fat 5.4g
Cholesterol 862.3mg	0%
Sodium 6457.6mg	0%
Total Carbohydrate 184.4g	0%
Dietary Fiber 16.1g	0%
Total Sugars 37.8g
Protein 252.2g	0%

Vitamin D 273.7IU	0%
Calcium 3258.5mg	0%
Iron 17.0mg	0%
Potassium 5751.8mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 54.9%

Protein: 26.1%

Carbs: 19.1%