Name: McDonald’s Big Mac Casserole (Low-Carb) Recipe
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: American
Ingredients: 1 ½ lbs ground beef; 1 small onion, diced; 2 cloves garlic, minced; ½ cup dill pickles, chopped; 2 cups shredded cheddar cheese; 4 large eggs; ½ cup heavy cream; ¼ cup mayonnaise; 1 tablespoon yellow mustard; 1 tablespoon Worcestershire sauce; 1 tablespoon sugar-free ketchup; Salt to taste; Pepper to taste; ¼ cup mayonnaise; 1 tablespoon dill pickle, finely chopped; 2 teaspoons yellow mustard; 2 teaspoons sugar-free ketchup; ½ teaspoon white vinegar; ½ teaspoon onion powder; ½ teaspoon garlic powder; Salt to taste; Pepper to taste; Shredded lettuce; Tomato, diced; Sliced pickles

Jump to Recipe·4 from 42 reviews

If you’ve ever wished you could enjoy the classic flavors of a Big Mac without the bun and carbs, then you are going to be absolutely thrilled to try this McDonald’s Big Mac Casserole (Low-Carb) Recipe. It’s a warm, cheesy, and savory dish that perfectly recreates that iconic taste while keeping things keto-friendly and satisfying. The ground beef, melted cheddar, tangy pickles, and that special Big Mac sauce come together in one irresistible casserole that you can bake and devour any night of the week. Trust me, this recipe turns a familiar fast-food favorite into a cozy homemade meal you’ll keep coming back to.

Ingredients You’ll Need

A white marbled surface displays various clear glass bowls and containers holding ingredients for a recipe. At the center is a large bowl filled with bright orange shredded cheddar cheese, with a large bowl of raw ground meat in pink placed above it. Around these are smaller bowls containing chopped white onions, chopped pickles, and a mixture of mayonnaise, mustard, ketchup, and spices. Two additional small bowls each hold mayonnaise, mustard, and ketchup in separate piles. To the left of these, three brown eggs sit next to a small bowl of white liquid, likely milk. A spoon with minced garlic rests above the eggs, alongside a bowl of dark brown soy sauce. There is a black pepper grinder on the right bottom corner and a pink salt grinder on the left bottom corner, completing the organized set of preparation ingredients. photo taken with an iphone --ar 4:5 --v 7

Getting this McDonald’s Big Mac Casserole (Low-Carb) Recipe right depends on simple, well-chosen ingredients that each add something special. From the beef that forms the hearty base to the creamy cheeses and the tangy pickles, every component plays a role in mimicking that beloved Big Mac flavor in a low-carb way.

1 ½ lbs ground beef: This is your protein-packed foundation, giving the casserole its meaty flavor and satisfying texture.
1 small onion, diced: Adds subtle sweetness and depth when sautéed with the beef.
2 cloves garlic, minced: Garlic brings a warm, aromatic punch to balance the rich flavors.
½ cup dill pickles, chopped: Essential for that classic Big Mac tang, providing bursts of acidity and crunch.
2 cups shredded cheddar cheese: Cheese makes the casserole irresistibly gooey and adds a sharp, creamy element.
4 large eggs: Eggs bond the casserole together, giving it structure and a luscious custard-like texture.
½ cup heavy cream: Adds richness and helps keep the casserole moist and silky.
¼ cup mayonnaise: Adds creamy fat and helps replicate that Big Mac sauce consistency in the dish.
1 tablespoon yellow mustard: Mustard gives a tangy zip that cuts through the richness perfectly.
1 tablespoon Worcestershire sauce: A savory umami boost that deepens the overall flavor.
1 tablespoon sugar-free ketchup: Keeps sweetness low-carb while adding classic ketchup notes.
Salt to taste: Balances and enhances all the flavors.
Pepper to taste: Adds just a hint of spice and complexity.
For the Keto Big Mac Sauce: Combination of mayonnaise, finely chopped dill pickle, yellow mustard, sugar-free ketchup, white vinegar, onion powder, garlic powder, salt, and pepper – which brings all the iconic sauce flavors to life without the carbs.
Optional toppings: Shredded lettuce, diced tomato, and sliced pickles for that fresh crunch and traditional Big Mac feel on top.

How to Make McDonald’s Big Mac Casserole (Low-Carb) Recipe

Step 1: Brown the Beef and Sauté Aromatics

Start by heating a large skillet over medium heat and cooking the ground beef until it’s thoroughly browned. This builds the savory base that carries all the flavors. Once browned, drain off any excess fat to keep the casserole from becoming greasy. Then, toss in the diced onion and minced garlic, cooking them just long enough until the onions turn translucent and fragrant – this step layers in a sweet and aromatic depth that’s key for flavor.

Step 2: Mix in Pickles and Cheese

Next, stir the chopped dill pickles into the beef mixture, sprinkling in 1 cup of shredded cheddar cheese while it’s still warm. The pickles add that unmistakable Big Mac zest, and the cheese begins melting right into the mix, creating pockets of gooey deliciousness. Spread this mixture evenly into a greased baking dish to prepare for that eggy custard layer.

Step 3: Whisk the Egg Mixture

In a separate bowl, whisk together the eggs, heavy cream, mayonnaise, yellow mustard, Worcestershire sauce, sugar-free ketchup, salt, and pepper. This blend is the magic binder that holds everything in place while infusing the casserole with creaminess and tanginess, perfectly echoing the flavors of the original sandwich’s special sauce. Pour this mixture slowly over the beef base, allowing it to seep through.

Step 4: Top and Bake

Sprinkle the remaining 1 cup of cheddar cheese evenly over the top for a golden, bubbly crust once baked. Transfer your dish to a preheated oven at 350°F (175°C) and bake for 30-35 minutes. You’ll know it’s done when the casserole is set firmly in the middle, and the cheese on top turns beautifully golden and bubbly, inviting you in with its irresistible aroma.

Step 5: Prepare the Keto Big Mac Sauce

While the casserole bakes, whip up the keto-friendly Big Mac sauce in a small bowl. Combine mayonnaise, finely chopped dill pickle, yellow mustard, sugar-free ketchup, white vinegar, onion powder, garlic powder, salt, and pepper. Stir it well until every ingredient melds together into a creamy, tangy sauce that perfectly replicates the iconic flavor. This sauce is the star topping that transforms the casserole into a full Big Mac experience.

How to Serve McDonald’s Big Mac Casserole (Low-Carb) Recipe

A piece of layered meat dish sits on a white plate over a red and white checkered cloth. The bottom layer is cooked ground meat mixed with onions, which has a brown and slightly crumbly texture. On top, there is melted yellow-orange cheese spreading unevenly over the meat. Above this, fresh green lettuce leaves, green sliced pickles, and bright red cherry tomato halves add color. An orange creamy sauce is drizzled over the top. A fork holds a bite of the layered dish showing the ground meat, onions, cheese, and sauce close-up. The background is blurred with a white marbled texture. photo taken with an iphone --ar 4:5 --v 7

Garnishes

Once the casserole is out of the oven and slightly cooled, pile on shredded lettuce, diced tomatoes, and sliced pickles. These fresh toppings add a delightful crunch and brightness that balance the rich meat and cheese. Finish it off by drizzling your homemade keto Big Mac sauce over the top to tie all the classic flavors together wonderfully.

Side Dishes

This casserole is hearty enough to be a main on its own but pairs beautifully with light, crisp sides. Think a leafy green salad with a vinaigrette, or some steamed low-carb veggies like broccoli or green beans. The sides add freshness and texture contrasts that keep the meal feeling balanced and exciting with every bite.

Creative Ways to Present

For a fun twist, try serving this McDonald’s Big Mac Casserole (Low-Carb) Recipe in individual ramekins for single servings, perfect for dinner parties or meal prep. You can also layer it in a clear glass casserole dish to show off those delicious layers, then garnish just before serving for a stunning presentation that will have everyone asking for seconds.

Make Ahead and Storage

Storing Leftovers

If you have leftovers, store them in an airtight container in the refrigerator. The casserole keeps well for up to 3 days, and the flavors actually deepen and meld after resting overnight. Just cover it well to prevent it from drying out.

Freezing

This casserole freezes brilliantly, making it a great option for batch cooking. Portion it into freezer-safe containers and freeze for up to 2 months. When you’re ready, thaw overnight in the fridge before reheating.

Reheating

To reheat, place a portion on a microwave-safe plate and cover loosely with a microwave-safe lid or paper towel. Heat for about 1 to 2 minutes until warmed through. Alternatively, reheat in a 325°F oven covered with foil to maintain moisture, for about 15-20 minutes until hot and bubbly again.

FAQs

Can I use ground turkey instead of ground beef?

Absolutely! Ground turkey works well as a leaner option, though it will have a slightly milder flavor. Adding extra seasoning or a bit more Worcestershire sauce can help boost the taste.

Is this recipe suitable for people on a strict keto diet?

Yes, this McDonald’s Big Mac Casserole (Low-Carb) Recipe is designed with keto-friendly ingredients, including sugar-free ketchup and no bread, keeping the carb count low and perfect for keto lifestyles.

Can I make this casserole dairy-free?

You can swap cheddar cheese for a dairy-free cheese alternative and replace heavy cream with full-fat coconut milk or another non-dairy substitute, though the texture and flavor will vary slightly.

How long does it take to prepare and cook this dish?

From start to finish, expect about 50 to 60 minutes: 15-20 minutes for prepping and browning, plus 30-35 minutes baking time. It’s a fantastic weeknight meal that’s mostly hands-off while it bakes.

Can I add extra vegetables to this casserole?

Definitely! Feel free to toss in low-carb veggies like chopped bell peppers or spinach for additional nutrition and flavor. Just sauté them alongside the onions and garlic so they soften nicely before baking.

Final Thoughts

This McDonald’s Big Mac Casserole (Low-Carb) Recipe is a true game-changer if you love the iconic flavors of a Big Mac but want a cozy, carb-conscious comfort meal. It’s packed with all the vibrant, savory, and tangy elements that make a Big Mac special, delivered in a hearty, cheesy casserole form. I promise once you try it, this will become your go-to dish for satisfying cravings without stepping away from your low-carb goals. So grab those ingredients and let’s make some magic happen in your kitchen!