Philly Cheesesteak Casserole – Cheesy, Creamy & Loaded with Flavor!

Philly Cheesesteak Casserole – Cheesy, Creamy & Loaded with Flavor! turns familiar cheesesteak-inspired ingredients into an easy baked dinner. Seasoned ground beef, colorful bell peppers, onions, garlic, and plenty of provolone come together beneath a creamy egg mixture for a hearty casserole with plenty of melted cheese.

Instead of filling sandwich rolls, this recipe layers everything into a 9×9-inch baking dish. The beef and vegetables provide the savory base, while eight slices of provolone melt across the top. Eggs, heavy whipping cream, and Worcestershire sauce bring the casserole together as it bakes.

The result works especially well for family dinners, meal prep, or any evening when you want warm comfort food without complicated preparation.

I started appreciating casseroles like this one because they turn a handful of everyday ingredients into something that feels much more substantial. I especially like cooking the peppers and onions with the beef instead of adding them raw. They soften slightly in the skillet while still keeping enough texture for the finished casserole. The provolone layer is another favorite part because it creates melted cheese across nearly every serving. Once the creamy egg mixture goes over everything, there isn’t much work left. I can clean the skillet while the casserole bakes, then give it five minutes to rest before cutting it into warm, cheesy portions.

Preparing the Savory Beef and Vegetables

Brown the Ground Beef

Preheat your oven to 350°F.

Lightly coat a 9×9-inch baking dish with cooking spray or butter and set it aside.

Next, place a large skillet over medium-high heat.

Add 1½ pounds ground beef and begin breaking it apart with a spatula or wooden spoon.

Continue cooking until the beef begins to brown.

Breaking the meat into relatively small pieces works particularly well for Philly Cheesesteak Casserole – Cheesy, Creamy & Loaded with Flavor! because it allows the beef to spread evenly across the baking dish later.

You don’t need to cook the beef completely before adding the vegetables. Instead, let it start browning and then move directly to the peppers and onion.

Cook the Peppers and Onion

Chop one red bell pepper and one green bell pepper.

Also chop ½ onion.

Add the peppers and onion directly to the skillet with the partially browned ground beef.

Continue cooking until the beef has browned completely and the vegetables begin to soften.

Next, stir in 2 teaspoons minced garlic and 1 teaspoon seasoned salt.

Cook for another 30 seconds.

The short cooking time gives the garlic a chance to become fragrant without letting it cook too long.

Finally, carefully drain any excess grease from the skillet.

You now have the savory beef-and-pepper foundation for the casserole.

Layering the Beef and Provolone

Build the Beef Layer

Transfer the cooked ground beef, bell peppers, and onion into the prepared 9×9-inch baking dish.

Use a spoon or spatula to spread the mixture evenly from one side of the dish to the other.

An even layer helps each serving contain a balanced amount of beef and vegetables.

The red and green bell peppers add both color and mild sweetness. Meanwhile, the onion and garlic provide additional savory flavor.

Because the beef has already been cooked and drained, you can focus the baking stage on setting the creamy filling and melting the cheese.

Cover With Provolone Cheese

Arrange 8 slices of provolone cheese over the beef mixture.

Position the slices so they cover as much of the surface as possible.

You can slightly overlap them when necessary.

As Philly Cheesesteak Casserole – Cheesy, Creamy & Loaded with Flavor! bakes, the provolone melts into the beef and vegetables and creates a rich cheese layer throughout the casserole.

Provolone also complements the beef without overwhelming the peppers and onions.

Once you’ve arranged all eight slices, leave the baking dish aside briefly while you prepare the creamy egg mixture.

Adding the Creamy Filling and Baking

Whisk the Egg Mixture

Crack 4 large eggs into a medium mixing bowl.

Add ¼ cup heavy whipping cream and 2 teaspoons Worcestershire sauce.

Whisk until the eggs, cream, and Worcestershire sauce become smooth and evenly combined.

The heavy cream adds richness, while Worcestershire sauce brings another savory note that works particularly well with the ground beef.

Slowly pour the egg mixture evenly over the provolone-covered beef.

Move around the baking dish as you pour so the liquid reaches the entire casserole rather than collecting in one area.

You don’t need to stir the assembled casserole.

Bake Until Set and Golden

Place the baking dish in the preheated 350°F oven.

Bake for approximately 35 to 40 minutes.

During baking, the egg mixture sets around the beef and vegetables while the provolone melts into a smooth, cheesy layer.

The casserole is ready when the creamy egg mixture has fully set and the cheese looks melted and lightly golden.

Because ovens can vary, begin checking near the 35-minute mark.

Remove Philly Cheesesteak Casserole – Cheesy, Creamy & Loaded with Flavor! from the oven and place the baking dish on a heat-safe surface.

Let it rest for 5 minutes before slicing.

Serving Philly Cheesesteak Casserole

Rest Before Cutting

Although the casserole smells tempting straight from the oven, the five-minute resting period helps considerably.

As the casserole rests, the hot filling has time to settle. Consequently, you can cut cleaner portions and transfer them from the baking dish more easily.

Use a sharp knife to divide the casserole into portions.

Then lift each serving with a flat spatula.

Each slice should contain browned beef, tender peppers and onions, melted provolone, and the creamy baked filling.

Serve Philly Cheesesteak Casserole – Cheesy, Creamy & Loaded with Flavor! while warm for the best melted-cheese texture.

Add Simple Sides

This casserole already provides a substantial combination of beef, vegetables, eggs, cream, and cheese.

Therefore, simple sides work especially well.

Try serving it with a crisp green salad, steamed green beans, roasted broccoli, or another uncomplicated vegetable.

If you want to lean further into the cheesesteak-inspired flavors, sautéed mushrooms can also make a flavorful accompaniment.

However, the casserole needs no elaborate additions. Its ground beef, peppers, onions, garlic, Worcestershire sauce, and melted provolone provide plenty of flavor on their own.

Whether you prepare it for a weeknight meal or save portions for later, this warm, cheesy casserole delivers a satisfying combination of creamy and savory flavors.

Ingredients

• 1½ pounds ground beef
• 1 red bell pepper, chopped
• 1 green bell pepper, chopped
• ½ onion, chopped
• 2 teaspoons minced garlic
• 1 teaspoon seasoned salt
• 8 slices provolone cheese
• 4 large eggs
• ¼ cup heavy whipping cream
• 2 teaspoons Worcestershire sauce
• 1 teaspoon cooking spray or butter, for greasing the baking dish

Instructions

1. Preheat the oven to 350°F and lightly grease a 9×9-inch baking dish with cooking spray or butter.
2. Heat a large skillet over medium-high heat. Add the ground beef and cook, breaking it apart, until it begins to brown.
3. Add the chopped red and green bell peppers and onion. Continue cooking until the beef has browned completely and the vegetables begin to soften.
4. Stir in the minced garlic and seasoned salt. Cook for another 30 seconds, then drain any excess grease.
5. Transfer the beef and vegetable mixture to the prepared baking dish and spread it evenly.
6. Arrange the 8 provolone slices over the beef mixture, covering as much of the surface as possible.
7. Whisk the eggs, heavy whipping cream, and Worcestershire sauce together until smooth. Pour the mixture evenly over the beef and cheese.
8. Bake for 35 to 40 minutes, until the egg mixture has set and the cheese is melted and lightly golden.
9. Remove the casserole from the oven and let it rest for 5 minutes.
10. Slice into portions and serve warm.

Frequently Asked Questions

Can I prepare Philly Cheesesteak Casserole ahead of time?

You can cook the beef, peppers, and onions ahead of time and refrigerate the mixture in a covered container. Then assemble the casserole with the provolone and egg mixture when you’re ready to bake it.

Why should I drain the ground beef?

Draining excess grease prevents unnecessary liquid from collecting in the bottom of the casserole. It also allows the creamy egg mixture and melted provolone to remain the main sources of richness.

Can I add mushrooms to the casserole?

Yes. Although mushrooms aren’t part of the provided recipe, sliced mushrooms pair naturally with beef, peppers, onions, and provolone. Sauté them with the other vegetables before assembling the casserole.

How do I know when the casserole is ready?

The egg mixture should look fully set rather than loose in the center. Additionally, the provolone should appear completely melted and lightly golden. The recipe generally needs 35 to 40 minutes at 350°F.

Why should Philly Cheesesteak Casserole rest before serving?

A five-minute rest allows the hot filling to settle after baking. As a result, the casserole becomes easier to cut and serve without the portions falling apart.

Conclusion

Philly Cheesesteak Casserole – Cheesy, Creamy & Loaded with Flavor! combines ground beef, colorful bell peppers, onions, garlic, and provolone in a simple baked dinner.

The preparation starts in a skillet, where the beef browns alongside the vegetables. After transferring everything to a baking dish, eight slices of provolone create a generous cheese layer.

Finally, eggs, heavy whipping cream, and Worcestershire sauce form the creamy mixture that brings the casserole together.

After 35 to 40 minutes in the oven and a short five-minute rest, Philly Cheesesteak Casserole – Cheesy, Creamy & Loaded with Flavor! is ready to slice and serve. It’s a straightforward way to enjoy savory beef, peppers, onions, and plenty of melted cheese in one comforting casserole.