Grilled Beef Casserole: Easy Comfort Food Recipe!

January 17, 2026

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Grilled beef casserole is more than just a meal; it’s a hug in a dish. Tender grilled beef nestled under a blanket of creamy, cheesy potatoes – it’s the kind of comfort food that evokes memories of family dinners and cozy weekends. I remember my grandmother making something similar, though hers always involved leftover roast. This grilled beef casserole version takes it to a whole new level of flavor, adding a smoky char that elevates the entire dish.

The inspiration for this grilled beef casserole comes from my desire to recreate the warmth and satisfaction of those childhood meals, but with a modern twist. I wanted to combine the ease of a casserole with the deliciousness of grilled beef. And trust me, this recipe delivers!

Why You Will Love This grilled beef casserole Recipe

This grilled beef casserole is a winner for so many reasons. First, it’s incredibly comforting. The combination of tender beef, creamy sauce, and cheesy potatoes is simply irresistible. Second, it’s surprisingly easy to make. Grilling the beef adds amazing flavor, but the casserole itself comes together quickly. Third, it’s a fantastic way to use leftover grilled beef, making it both economical and delicious. It’s the perfect balance of flavor and convenience.

Not only is it easy, but this casserole is also a guaranteed crowd pleaser! I’ve served it at potlucks, weeknight dinners, and even casual gatherings. Every single time it’s been a hit! The rich, savory flavor is sure to satisfy even the pickiest eaters. Plus, it can be easily customized to your liking. Want to add more vegetables? Go for it! Prefer a different type of cheese? No problem!

grilled beef casserole - Detail or variation — Close-up detail

Ingredients Needed for This grilled beef casserole Recipe

For the Grilled Beef:

* 1.5 pounds beef sirloin steak * 2 tablespoons olive oil * 1 teaspoon salt * 0.5 teaspoon black pepper * 1 teaspoon garlic powder

For the Casserole:

* 6 medium Yukon Gold potatoes, peeled and thinly sliced * 1 medium yellow onion, diced * 2 cloves garlic, minced * 0.25 cup all purpose flour * 3 cups beef broth * 1 cup milk * 1 teaspoon Worcestershire sauce * 0.5 teaspoon salt * 0.25 teaspoon black pepper * 1.5 cups shredded cheddar cheese, divided

How to Make This grilled beef casserole Recipe

1. Prepare the Beef: Preheat your grill to medium high heat. Rub the sirloin steak with olive oil, salt, pepper, and garlic powder.
2. Grill the Beef: Grill the steak for 4 6 minutes per side, or until desired doneness. Let it rest for 10 minutes before slicing into bite sized pieces.
3. Sauté Vegetables: Preheat oven to 375°F (190°C). In a large skillet, heat a tablespoon of olive oil over medium heat. Add the diced onion and cook until softened, about 5 minutes. Add the minced garlic and cook for another minute until fragrant.
4. Make the Sauce: Sprinkle the flour over the onion and garlic mixture. Cook for 1 minute, stirring constantly. Gradually whisk in the beef broth and milk until smooth. Add Worcestershire sauce, salt, and pepper. Bring to a simmer, stirring constantly, until the sauce has thickened slightly, about 5 minutes.
5. Assemble the Casserole: In a large bowl, combine the sliced potatoes, sauce, and 1 cup of shredded cheddar cheese. Mix well to ensure the potatoes are evenly coated.
6. Layer and Bake: Pour half of the potato mixture into a greased 9×13 inch baking dish. Spread the sliced grilled beef evenly over the potato layer. Top with the remaining potato mixture.
7. Bake: Cover the baking dish with foil and bake for 45 minutes. Remove the foil, sprinkle with the remaining 0.5 cup of cheddar cheese, and bake for another 15 20 minutes, or until the potatoes are tender and the cheese is melted and bubbly.
8. Cool and Serve: Let the casserole cool for a few minutes before serving.

You might also enjoy this Grilled Beef Soup for another comforting meal.

How to Serve This grilled beef casserole Recipe

This grilled beef casserole is delicious on its own, but it also pairs well with a simple green salad or steamed vegetables. For a heartier meal, serve it alongside a crusty bread roll to soak up the delicious sauce. Consider adding a dollop of sour cream or a sprinkle of fresh herbs like parsley or chives for an extra touch of flavor and visual appeal. For a truly decadent experience, try topping it with crumbled bacon.

How to Store This grilled beef casserole Recipe

Leftover grilled beef casserole can be stored in an airtight container in the refrigerator for up to 3 4 days. To freeze, allow the casserole to cool completely before wrapping it tightly in plastic wrap and then in aluminum foil. It can be frozen for up to 2 3 months. To reheat, thaw overnight in the refrigerator before baking in a preheated oven at 350°F (175°C) until heated through, about 20 30 minutes. You can also reheat individual portions in the microwave.

Tips to Make This grilled beef casserole Recipe

For the best flavor, use a good quality beef sirloin steak.
Make sure to slice the potatoes thinly and evenly so they cook through properly.
Don’t overcook the beef on the grill, as it will continue to cook in the casserole.
If you don’t have beef broth, you can use chicken broth or vegetable broth instead.
Feel free to add other vegetables to the casserole, such as carrots, celery, or bell peppers.

Grilled Cod Casserole 2 is another great weeknight dinner option!

Helpful Notes for This grilled beef casserole Recipe

The thickness of the potato slices impacts cook time. Aim for about 1/8 inch. If they are too thick, they won’t fully cook.

Worcestershire sauce adds a depth of flavor to the sauce, but you can substitute it with soy sauce or balsamic vinegar if you don’t have any on hand.

Variation of This grilled beef casserole Recipe

Spicy Grilled Beef Casserole: Add a pinch of cayenne pepper or a dash of hot sauce to the sauce for a spicy kick.
Mushroom and Swiss Grilled Beef Casserole: Add sautéed mushrooms to the potato mixture and use Swiss cheese instead of cheddar cheese.
Vegetarian Grilled Beef Casserole: Try substituting the grilled beef with grilled portobello mushrooms for a vegetarian version.

What kind of beef is best for grilled beef casserole?

Sirloin, flank steak, or even pre-cooked roast beef work well for grilled beef casserole. The key is to choose a cut that’s tender or will become tender during grilling.

How do you prevent the casserole from getting soggy?

To avoid a soggy casserole, make sure to slightly undercook the potatoes before assembling the dish. Also, consider using a thickening agent in the sauce to prevent excess moisture.

What are some good side dishes to serve with grilled beef casserole?

A fresh green salad, steamed vegetables like broccoli or green beans, or crusty bread are all excellent choices to serve alongside grilled beef casserole. These offer a lighter contrast to the richness of the casserole.

Can I prepare the grilled beef casserole ahead of time?

Yes, you can assemble the casserole ahead of time and store it in the refrigerator for up to 24 hours before baking. Just add a few extra minutes to the baking time to ensure it’s heated through properly.

Conclusion

This grilled beef casserole is a guaranteed family favorite, bringing together the smoky goodness of grilled beef with the comforting warmth of a classic casserole. This is a recipe that’s sure to become a staple in your cooking routine. I hope you’ll give this grilled beef casserole recipe a try and let me know what you think! Don’t forget to share your creations and leave any questions you might have in the comments below! Enjoy!