This Keto Bacon Cheeseburger Casserole packs all the flavors of a classic Big Mac into a hearty, cheesy bake. Topped with your favorite burger fixings, it’s an easy and family-friendly low-carb dinner.

Jump to:

• ❤️ Why You'll Love This Big Mac Casserole Recipe
• 🛒 Ingredients for Big Mac Casserole
• 🔪 How to Make Bacon Cheeseburger Keto Casserole
• 💡 Tips for Making Keto Big Mac Casserole
• ☑️ Storage Instructions
• 🍴 What to Serve with Hamburger Casserole
• 🔄 Substitutions and Additions
• Can I Make this Casserole Ahead of Time?
• Why is My Casserole Watery?
• How Do I Serve Keto Cheeseburger Casserole?
• 🍽️ More Keto Casserole Recipes

❤️ Why You'll Love This Big Mac Casserole Recipe

• All the same flavors of the classic Big Mac burger
• Made into a hearty and filling casserole
• Baked with gooey melted cheddar cheese
• Topped with your favorite burger toppings
• Easy to make and family friendly

This Keto Bacon Cheeseburger Casserole is the ultimate way to enjoy all the flavors of a classic Big Mac without the bun...or the guilt! Juicy beef, crispy bacon, and gooey melted cheddar come together in a single dish that’s hearty, satisfying, and downright delicious.

But can we talk about how versatile this casserole is? You can pile on shredded lettuce, pickles, and tomatoes for that burger-inspired finish, or keep it simple and cheesy, it's your call! It’s easy to make, loaded with flavor, and sure to be a hit with anyone who loves a good burger.

If you love the flavors in the casserole, you should also check out my Big Mac Cheeseburger Salad.

🛒 Ingredients for Big Mac Casserole

• Ground beef
• Cheddar cheese
• Uncured bacon
• Keto Thousand Island Dressing
• Baby bella mushrooms
• Yellow onion
• Eggs
• Heavy cream
• Yellow mustard
• Worcestershire
• Garlic
• Optional Toppings: Shredded lettuce, chopped (sugar-free) pickles, chopped fresh tomatoes

*Exact measurements are listed in the recipe card below.

🥣 Recommended Tools

• Large skillet
• Mixing bowl
• Whisk
• 9 x 13 casserole baking dish

🔪 How to Make Bacon Cheeseburger Keto Casserole

Prepare the Thousand Island Dressing, also mixing in the smoked paprika.

Set the dressing aside to allow the flavors to meld.

Chop the bacon into small pieces and fry in a large skillet until crisp.

Remove the bacon and most of the grease, leaving about 2 tablespoons in the skillet.

Add in the mushrooms and onions, then sauté until tender. Remove and set aside.

Preheat oven to 375°F.

Add the ground beef into the skillet, salt and ground black pepper. Cook until browned, then add in the minced garlic and sauté for another 15 seconds, making sure not to brown it.

Add the ground beef and sautéed garlic to a large mixing bowl along with the chopped pickles, half the shredded cheddar cheese, most of the cooked bacon (reserving some for garnish), sautéed mushrooms and onions.

In a separate bowl, add in half the dressing, yellow mustard, eggs, worcestershire and heavy cream. Whisk until well combined, then pour over the ground beef mixture and mix until well combined.

Pour into a 9 x 13 casserole baking dish that’s been sprayed with a nonstick spray. Top with the remaining shredded cheddar cheese and bake for 25-30 minutes or until cooked through.

Serve as is or top with the remaining bacon and Thousand Island Dressing, as well as the toppings of your choice: shredded lettuce, pickles and/or tomatoes.

💡 Tips for Making Keto Big Mac Casserole

• For the meat, I use 85% ground beef that's organic and grass-fed.  On Keto, you can certainly use 80%, but you'll want to make sure and really drain off any extra fat before adding to the casserole.

• For the best melty texture, shred your cheddar cheese from a block. Pre-shredded cheese often has anti-caking agents that can affect how it melts.

• Be careful not to overbake it. Keep an eye on the casserole while it’s in the oven. Overbaking can dry it out, so pull it as soon as the center is set and the cheese is melted.

• After baking, let the casserole sit for about 5–10 minutes before serving. This allows it to firm up and makes it easier to slice and serve.

☑️ Storage Instructions

This is one of those casseroles where the leftovers not only taste great, but I think they taste even better! Store leftovers in the fridge for a few days. It also freezes and reheats really well, so it's perfect for meal prepping.  

You can portion out and freeze in an air tight container for up to a couple of months for those days when you're pressed for time and need something you can thaw and reheat easily.

🍴 What to Serve with Hamburger Casserole

This is a very filling casserole so a simple salad or a side of you favorite veggies is all you need. Here some options:

• Overnight 7 Layer Salad
• Oven Roasted Vegetables
• Israeli Salad
• Roasted Cauliflower Steaks
• Broccoli Salad

🔄 Substitutions and Additions

• Eggs: I used 4 eggs in this casserole, primarily to act as a binder.  If you want more of a quiche-like consistency, you can add 2-4 additional eggs. The eggs I use are cage-free and organic.

• Bacon: I also used uncured bacon that has the lowest carbs and sugar. I prefer my bacon and cold cuts with no nitrates but sometimes you cannot avoid a smidge of sugar.

• Cheese: The cheese I used is sharp cheddar, which is my favorite to serve on burgers.  If you don't like sharp cheddar, use any cheddar you like.  Or you can use a different cheese all together, like Monterey Jack or Colby, if that's what you like or have on hand. Keep in mind, though it does save time using pre-shredded, by shredding your own cheese, you avoid the anti-caking ingredients some brands use that may have hidden carbs.

• Veggies: I used yellow onion, garlic and mushrooms in the mix, but if you want to omit either, you can.  Keep in mind, they all contribute to the flavor of this casserole, so if you omit them, I'd replace with something else.  Peppers would be a good alternative, if that's what you like. 

• Mustard: I also added Worcestershire, sugar-free ketchup (I used G.Hughes, it's my favorite) and yellow mustard to give the casserole a more burger-like flavor.  If you prefer spicy mustard, you can use it instead. You can add more or less, depending on your taste.  I think the recipe has a good balance as is.

• Sauce: You can also give the casserole a more barbecue like flavor by substituting Low Carb BBQ sauce for the ketchup and mustard. The great thing is you can customize this casserole to your liking, depending on how you like your burgers to taste.  So if there are other toppings that you prefer, by all means use what ever you like!

Can I Make this Casserole Ahead of Time?

Absolutely! Assemble it up to a day in advance, cover tightly, and store in the fridge. Bake just before serving.

Why is My Casserole Watery?

Excess liquid can come from not draining the ground beef or bacon properly. Make sure to drain grease thoroughly before mixing the ingredients.

How Do I Prevent The Eggs From Curdling?

Use room-temperature ingredients and avoid overcooking. Mixing the eggs well with the cream and dressing helps create a smooth texture.

How Do I Serve Keto Cheeseburger Casserole?

I tried several different ways of serving this casserole.  I added chopped cooked bacon over the top because, well, who doesn't LOVE bacon!

I also added shredded lettuce, tomatoes from my garden and pickle.  You can serve this way or you can also add a drizzle of mustard and ketchup or even mayonnaise, if you'd like. Alternatively, you can drizzle some Thousand Island Dressing over the top, which is great as well!

🍽️ More Keto Casserole Recipes

• Spinach Artichoke Casserole
• Chicken Parmesan Casserole
• Easy Taco Casserole
• Chicken Pot Pie Casserole
• Loaded Creamy Cauliflower Casserole
• Chicken Cordon Bleu Casserole
• Easy Sausage & Pepper Casserole
• Chicken Florentine Casserole

If you would like to know more about how to meal prep for your Keto journey, check out this article for some great tips and recipes.

*Originally published on August 22, 2019, updated on January 31, 2025 with improvements to the recipe, new photos, new recipe information and helpful tips.