🥩🧀 Keto Low-Carb Philly Cheesesteak Casserole
If you love the flavors of a classic Philly cheesesteak but want to skip the carbs, this Keto Low-Carb Philly Cheesesteak Casserole is the perfect solution. Tender ground beef (or thinly sliced steak), sautéed peppers, onions, mushrooms, and a creamy blend of cream cheese, provolone, and mozzarella come together in one irresistible baked casserole.
It’s hearty enough for dinner, simple enough for busy weeknights, and perfect for meal prep.
❤️ Why You’ll Love This Recipe
Only about 6g net carbs per serving
High in protein
Rich, cheesy, and satisfying
One-pan casserole
Great for meal prep
Keto and gluten-free
Family-friendly
Ready in under an hour
📋 Recipe Information
Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Servings: 6
Course: Main Course
Cuisine: American
🛒 Ingredients
Casserole
2 pounds lean ground beef (or 1½ pounds thinly sliced sirloin or ribeye)
2 tablespoons olive oil
1 medium green bell pepper, sliced
1 medium red bell pepper, sliced
1 medium onion, thinly sliced
8 ounces mushrooms, sliced
4 cloves garlic, minced
1 teaspoon Worcestershire sauce
1 teaspoon Italian seasoning
1 teaspoon onion powder
½ teaspoon smoked paprika
1 teaspoon kosher salt
½ teaspoon black pepper
Cheese Layer
8 ounces cream cheese, softened
½ cup heavy cream
1½ cups shredded mozzarella cheese
8 slices provolone cheese
½ cup grated Parmesan cheese
Optional Garnishes
Fresh parsley
Red pepper flakes
Extra provolone
Sliced green onions
🍳 Equipment Needed
Large skillet
9×13-inch baking dish
Mixing bowl
Wooden spoon
👩🍳 Instructions
Step 1: Preheat
Preheat the oven to 375°F (190°C).
Lightly grease a 9×13-inch baking dish.
Step 2: Cook the Vegetables
Heat the olive oil in a large skillet over medium-high heat.
Cook the:
Bell peppers
Onion
Mushrooms
for 6–8 minutes until softened.
Add the garlic and cook for 30 seconds.
Transfer the vegetables to a bowl.
Step 3: Brown the Beef
Add the ground beef to the same skillet.
Cook for 7–8 minutes, breaking it into crumbles.
Drain excess grease if necessary.
Stir in:
Worcestershire sauce
Italian seasoning
Onion powder
Smoked paprika
Salt
Pepper
Step 4: Make the Cheese Sauce
Reduce the heat to low.
Stir the cream cheese and heavy cream into the beef until smooth.
Mix in:
Mozzarella
Parmesan
Continue stirring until melted and creamy.
Step 5: Assemble
Fold the cooked vegetables into the beef mixture.
Spread evenly into the prepared baking dish.
Top with the provolone slices.
Step 6: Bake
Bake for 15–20 minutes, until bubbly and the cheese is melted.
For a golden top, broil for 2–3 minutes.
Step 7: Serve
Let the casserole rest for 5 minutes.
Sprinkle with parsley or green onions before serving.
💡 Tips for Success
Use Thin Steak
If using steak instead of ground beef, freeze it for 20 minutes before slicing for easier, paper-thin cuts.
Drain Excess Fat
If your beef releases a lot of grease, drain most of it before adding the cheeses.
Freshly Shred Cheese
Freshly shredded cheese melts much more smoothly than pre-shredded varieties.
Let It Rest
Allowing the casserole to rest helps it slice neatly and lets the cheese set.
🌟 Delicious Variations
Spicy Philly
Add:
Jalapeños
Pepper Jack cheese
Crushed red pepper flakes
Bacon Cheesesteak
Mix in 8 slices of cooked, crumbled bacon before baking.
Mushroom Lover’s
Double the mushrooms for extra flavor and texture.
Carnivore Version
Omit the peppers, onions, mushrooms, Worcestershire sauce, and seasonings. Use only beef, cream cheese, heavy cream, mozzarella, provolone, Parmesan, and salt for a carnivore-friendly casserole.
🍽️ What to Serve With It
This casserole pairs well with:
Roasted broccoli
Garlic green beans
Caesar salad
Steamed asparagus
Cauliflower mash
Roasted Brussels sprouts
Air Fryer zucchini
Cucumber salad
Last weekend, I served it with roasted broccoli and a crisp Caesar salad. The fresh vegetables balanced the rich, cheesy casserole perfectly.
🥡 Storage Instructions
Refrigerator
Store in an airtight container for up to 4 days.
Freezer
Freeze individual portions for up to 3 months.
Thaw overnight before reheating.
Reheating
Microwave for 1–2 minutes, or bake at 350°F (175°C) for 15 minutes until heated through.
📊 Nutrition Information (Approximate Per Serving)
Calories: 560
Protein: 39g
Fat: 41g
Carbohydrates: 8g
Fiber: 2g
Net Carbs: 6g
Saturated Fat: 20g
Sodium: 690mg
Nutrition values are approximate and may vary depending on the brands and ingredients used.
❓ Frequently Asked Questions
Can I use steak instead of ground beef?
Yes! Thinly sliced sirloin, ribeye, or shaved beef gives this casserole an authentic Philly cheesesteak flavor.
Is this casserole freezer-friendly?
Absolutely. Cool completely, portion into airtight containers, and freeze for up to 3 months.
Can I make it ahead?
Yes. Assemble the casserole up to 24 hours in advance, refrigerate, and bake when ready.
Can I add more vegetables?
Certainly. Zucchini, spinach, or cauliflower rice are great low-carb additions.
What’s the best cheese to use?
Provolone is the classic choice, but mozzarella, white American cheese, or Monterey Jack also melt beautifully.
💚 Final Thoughts
This Keto Low-Carb Philly Cheesesteak Casserole brings together all the savory goodness of a classic cheesesteak in a warm, cheesy bake that’s low in carbs and high in flavor. Packed with seasoned beef, sautéed vegetables, and layers of melted cheese, it’s a comforting meal that’s perfect for weeknight dinners, meal prep, or feeding a hungry crowd.
