The Best Big Mac Casserole Recipe (Low Carb) (2024)

High Protein Ingredients

For the casserole:

• Russet Potatoes - Russet potatoes are what classic French fries are made of, making them perfect for this Big Mac Casserole.
• Ground Beef - I used 96% lean. I wouldn’t go lower than 90% lean or you'll need to drain excess grease. It should be a flavorful and juicy ground beef.
• Worcestershire Sauce - for that umami flavoring
• White Onion -We will sauté these a bit and they'll caramelize.
• Dill Pickles - Use pickle coins. Just like you’d get on a cheeseburger.
• Ranch Seasoning - A simple way to pack in SO much flavor. I use this in my Turkey Spinach Feta Burgers, too.

For the Fry Sauce:

• Light Mayo - The base of our fry sauce.
• Honey Mustard and Low Sugar Ketchup - Because a Big Mac needs ketchup and mustard, of course.
• Dill Pickle Juice - Thins the sauce a bit with some tangy flavor.

See the recipe card below for a full list of ingredients and measurements.

How to Make This Recipe

1. Preheat the oven to 350°F and prepare the veggies. Slice potatoes into ~½ inch rounds, and then dice them into ½” cubes. I use this vegetable chopper and it’s effortless. Finely dice the white onion, bell pepper, and jalapeño, too.

2. For the fry sauce, combine all of the ingredients in a glass measuring cup or small bowl and stir. If you’d like, you can also add little pieces of diced pickle to the sauce for more texture.

• Pro tip! Double (or triple) the fry sauce and use it throughout the week on sandwiches, breakfast potatoes, burgers, and well, FRIES! The whole family will love it!

3. Add the diced potatoes to a baking dish and coat in olive oil, garlic powder, onion powder, and salt + pepper. Pop them into the oven for 25 minutes. We’re coming back to them, but potatoes need longer to cook, but in the meantime make the fry sauce and meat mixture next.

4. Then, heat a large skillet to medium-high heat and grease with cooking spray. Add the lean ground beef, diced bell pepper, onion, and jalapeño. Mix until the ground beef is ~80% cooked, then mix in the Worcestershire sauce and ranch seasoning. Allow the beef to cook through.

5. By this time, the potatoes should be close to golden brown. Remove the dish from the oven but keep the oven on. Add ground beef mixture, canned tomatoes (drained), and ½ of the fry sauce on top of the potatoes. Stir it all together.

6. Then, top the mixture with pickle slices, sesame seeds, and cheddar cheese and cover the casserole with tinfoil sprayed with cooking spray (aluminum foil is a must, otherwise it will significantly dry out). Bake for another 20 minutes. Serve on a bed of shredded lettuce and drizzle the creamy big mac sauce on top of the casserole. Enjoy!

Because this is a low carb casserole, it includes sesame seeds instead of a sesame seed bun. Idea: instead of using russet potatoes, try using tater tots and turning it into big mac tater tot casserole.

Pro Tip

How to store casserole

This big mac casserole recipe can be kept in the fridge for 3-4 days. It’s actually better on the second day, as the flavors and ingredients set together. Reheat in the microwave for 60-90 seconds until warmed throughout. NOTE: If you’re making this for meal prep, do not add the lettuce until ready to serve. It will get soggy.

Can you freeze this casserole?

Yes! You can freeze this burger casserole for up to 3 months. You can freeze the entire thing right in the casserole dish if covered tightly, or individual portions in an airtight container.

Do I have to make the sauce from scratch?

Thousand island dressing is a great alternative for fry sauce if you're short on time! You’ll need about ⅓ cup total. Or if you need more dressing, top your dish with mustard, ketchup, or ranch, too!

Other favorite burger toppings

Lettuce, tomatoes, onions, and pickles are tried and true classic big mac staples, but don't stop there. Crispy bacon strips, sliced avocado, sautéd mushrooms, a fried egg, or other flavorful aioli, would be delicious on this entire casserole!

The Best Big Mac Casserole (Low Carb)

Hello comfort food! This Big Mac Casserole is so satisfying and is one of those stick to your ribs meals, but made with lighter ingredients and high in protein.

Nutrition

Serving: 1 serving | Calories: 393kcal | Carbohydrates: 36g | Protein: 30g | Fat: 14g | Saturated Fat: 2g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Cholesterol: 60mg | Sodium: 1139mg | Potassium: 1096mg | Fiber: 3g | Sugar: 7g