If you’re searching for a dish that blends comforting cheeseburger flavors with a fresh, low-carb twist, this Cheeseburger Spaghetti Squash Casserole (Low Carb + Low Calorie) Recipe is your new best friend! Imagine juicy, seasoned ground beef and tender mushrooms marrying perfectly with vibrant spaghetti squash strands, all wrapped up in melty cheddar cheese and a hint of creamy goodness. It’s a warm, hearty meal that feels indulgent without the extra carbs or calories, making it a fantastic option for anyone wanting to enjoy cheeseburgers in a smart, healthy way.

Ingredients You’ll Need

The image shows eight bowls arranged on a white marbled surface. At the top center is a white bowl filled with chopped brown mushrooms. To the right is a white bowl with bright red ground beef. Below the beef is a white bowl of chopped white onions. Near the onions is a small white bowl containing smooth whipped cream cheese. At the bottom center is a white bowl holding bright red diced tomatoes. To the left of the tomatoes is a white bowl filled with shredded orange cheddar cheese. Above the cheddar is a white bowl overflowing with bright yellow shredded spaghetti squash. At the top left corner, there are two small white bowls, one with salt and another with steak seasoning, having a mix of brown and red textures. photo taken with an iphone --ar 4:5 --v 7

This recipe shines because of its straightforward, wholesome ingredients. Each component plays a crucial role, whether adding texture, richness, or vibrant pops of flavor. From the naturally sweet spaghetti squash to the savory ground beef seasoned just right, these ingredients come together effortlessly to create a standout meal.

1 large spaghetti squash (750g): The star low-carb “pasta” that delivers a satisfying texture and subtle sweetness.
1 medium yellow onion (220g), diced: Brings natural sweetness and depth when sautéed with mushrooms.
8 oz. mushrooms, roughly chopped: Adds earthiness and a tender bite, balancing the beef’s richness.
1 lb. 96/4 ground beef: Lean and flavorful protein that mimics that classic cheeseburger essence.
1 14.5 oz can diced tomatoes, drained: Provides juiciness and a touch of acidity to brighten the casserole.
4 oz. reduced-fat cream cheese (112g), softened: Elevates the creamy factor without extra calories or fat.
1 Tbsp steak seasoning: Infuses the beef and veggies with irresistible savory notes.
1/4 tsp salt: Essential to tie all flavors together perfectly.
1 cup shredded cheddar cheese (112g), divided: Melts beautifully on top and inside, delivering that beloved cheeseburger comfort.

How to Make Cheeseburger Spaghetti Squash Casserole (Low Carb + Low Calorie) Recipe

Step 1: Prepare the Spaghetti Squash

Start by prepping your spaghetti squash—it’s the heart of this dish. After cooking it through your preferred method (baking or microwaving), shred the flesh with a fork to create those signature “noodles”. These strands act as a wonderful base that soaks up all the juicy, cheesy flavors while keeping the meal light.

Step 2: Cook the Onions and Mushrooms

Heat a splash of cooking spray in a skillet and toss in your diced onions and mushrooms. Cook over medium heat until tender and fragrant, usually about 4-5 minutes. This step brings out their natural sweetness and earthy notes, adding depth to every bite. Be sure to drain any excess liquid, so your casserole isn’t watery.

Step 3: Brown the Ground Beef

In the same skillet, add your lean ground beef and cook it over medium heat until it’s completely browned and broken into nice, small pieces. Drain off any fat to keep things lean and clean, then mix this savory meat with your softened vegetables in a large mixing bowl.

Step 4: Combine Ingredients

Into the bowl with your cooked veggies and beef, add the drained diced tomatoes, softened cream cheese, steak seasoning, salt, and half of your shredded cheddar cheese. This is where the magic really happens as you combine creamy, savory, and tangy elements that make this dish so irresistible. Mix everything very well so all ingredients are evenly incorporated.

Step 5: Assemble and Bake

Transfer your mixture into a prepared 9×13-inch baking dish that’s been sprayed with cooking spray. Spread it out evenly, then sprinkle the remaining cheddar cheese over the top. Bake at 375 degrees Fahrenheit for 20-25 minutes, or until the cheese on top is melted, bubbly, and golden. The aroma alone will have you drooling!

How to Serve Cheeseburger Spaghetti Squash Casserole (Low Carb + Low Calorie) Recipe

A white plate holds a layered dish with three thick layers: the bottom layer is a mix of cooked ground meat and vegetables with a soft texture and muted brown and red colors, the middle layer is a generous amount of melted golden-yellow cheese covering the top, and the top layer shows some browned spots on the cheese. Next to the main dish is a fresh green salad with different types of leafy greens, including dark purple and bright green leaves, mixed with halved yellow and red cherry tomatoes. The plate is placed on a white marbled surface with a fork resting on the upper right side of the plate, and a woman's hand is gently lifting the plate from the side. In the background, another white plate with the same dish is slightly out of focus. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

To elevate your serving, try some fresh chopped green onions or a handful of crispy pickles on top for that classic cheeseburger vibe. A sprinkle of freshly cracked black pepper or a dash of hot sauce can also kick the flavor up a notch without overwhelming the healthy balance.

Side Dishes

This casserole is hearty on its own, but pairing it with a light, fresh side like a crisp green salad or steamed broccoli can add a beautiful contrast in texture and keep things well-rounded and wholesome.

Creative Ways to Present

For a fun twist, you can spoon the casserole into individual ramekins or hollowed-out mini bell peppers before baking. It makes for a charming presentation that’s perfect for lunchboxes or casual dinner parties, making everyone feel special!

Make Ahead and Storage

Storing Leftovers

This casserole stores beautifully in an airtight container in the refrigerator for up to 4 days. Leftovers reheat wonderfully, retaining the cheesy, savory goodness just like day one.

Freezing

If you want to make this ahead for busy weeks, freeze it before baking in a freezer-safe dish. It can stay frozen for up to 2 months. When you’re ready, thaw it overnight in the fridge before baking fresh.

Reheating

Reheat your leftovers in a microwave or oven until warmed through. A few extra minutes under the broiler can help revive that perfect cheese crust on top—just keep an eye to prevent burning.

FAQs

Can I use another type of cheese instead of cheddar?

Absolutely! While cheddar is classic for that cheeseburger taste, feel free to try mozzarella, Monterey Jack, or even pepper jack for a spicy twist.

Is spaghetti squash the only vegetable suitable for this dish?

Spaghetti squash offers a unique noodle-like texture that complements the savory filling perfectly, but you could experiment with shredded zucchini or cauliflower rice for slightly different textures and flavors.

Can I make this recipe vegetarian?

Yes! Swap the ground beef with plant-based ground meat or extra mushrooms to keep it hearty and satisfying while maintaining the flavor balance.

How do I know when the spaghetti squash is cooked properly?

It’s done when you can easily shred the flesh into long strands with a fork. If it’s tough or resistive, give it a few more minutes of cooking.

Is this dish suitable for meal prep?

Definitely. Its balanced nutrition and ease of reheating make it excellent for making ahead and enjoying throughout the week.

Final Thoughts

I can’t recommend the Cheeseburger Spaghetti Squash Casserole (Low Carb + Low Calorie) Recipe enough for anyone craving the deliciousness of a cheeseburger without the guilt. It’s truly a comforting, flavorful meal that proves eating well doesn’t mean sacrificing taste. Give it a try and watch it quickly become a favorite in your recipe rotation!