Keto Cheeseburger Casserole

This is the casserole I make when I want cheeseburger flavor and an actual vegetable in the same dish, not a side salad I forget about. A creamy mashed cauliflower base sits under a cheesy ground beef topping, and it’s ready in 40 minutes.

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I like that this gets vegetables into a beef dinner without anyone noticing they’re eating cauliflower. Use fresh cauliflower here, not frozen, since frozen cauliflower turns the base watery and soupy instead of properly creamy.

Chef Jenn’s Take on Keto Cheeseburger Casserole

The most common mistake with this recipe is reaching for frozen cauliflower to save a step. I’ve had readers ask about it, and the answer is no, don’t do it. Frozen and thawed cauliflower turns mushy and releases so much extra water that the base goes soupy instead of holding together as a proper layer under the beef. Fresh cauliflower, microwaved just until tender, is what actually gives you a base that purées smooth and holds its shape.

The other detail that matters is draining the beef fat before you add the cream cheese. Skip that step and the beef layer turns greasy instead of creamy, and cream cheese needs a relatively dry base to melt into something smooth rather than separating. Don’t skip the garnishes either. Pickles, diced tomato, and red onion on top do more for this dish than people expect, since they cut through the richness of two layers of cheese and beef.

What You’ll Love About Keto Cheeseburger Casserole

• It gets an actual vegetable into a beef dinner without anyone at the table treating it like a compromise.
• The garnishes on top, pickles, tomato, and onion, cut the richness enough that this doesn’t feel heavy by the last bite.
• It reheats well, so this holds up as a genuine second-night dinner instead of tasting worse the next day.

Ingredients

For the creamy cauliflower base:

• Cauliflower – One medium-sized head will work. Fresh cauliflower is best with this recipe.
• Heavy whipping cream – To make the cauliflower mash silky smooth.
• White cheddar – You can use yellow cheddar, but then your mash will be yellowish.
• Egg – Just 1 egg to help bind the mash.

For the beefy layer:

• Ground beef – I use lean ground beef in this recipe, so I don’t have to drain off fat.
• Onion powder – I save a few carbs by using onion powder.
• Garlic powder – Gotta have some garlic flavor!
• Salt and pepper – To season the beef.
• Cream cheese – This will make the beefy layer creamy.
• Worchestershire sauce – Adds more flavor to the cheeseburger layer.
• Ketchup – Use your favorite sugar-free brand.
• Cheddar cheese – Shred it yourself to avoid the starchy anti-clumping agents added to pre-shredded cheese.

For the topping:

• Yellow mustard – Regular hot dog mustard is fine.
• Sour cream – Full fat, please.
• Pickles, red onions, and diced tomatoes – All optional, but they add flavor, texture, and color.

How to Make Keto Cheeseburger Casserole

Scroll down for the full recipe card with exact measurements and printable instructions.

Cut the cauliflower into florets, put it in a bowl with 1/4 cup of water, and cover it with plastic wrap. Microwave on high to steam it until tender.

Drain the cauliflower and puree it with cream, egg, and white cheddar cheese until smooth. Set aside.

Brown the beef along with the onion and garlic powder, salt and pepper. Drain off any excess fat and discard the fat.

Turn the heat down to low and add the cream cheese, stirring until it is melted. Add the Worcestershire sauce and sugar-free ketchup. Adjust the seasoning with salt and pepper.

Add the mashed cauliflower in a layer on the bottom of a 9×9 (or similar) casserole dish. Add the ground beef mixture to the top and sprinkle with cheddar cheese.

Bake covered with foil at 375-F for about 15-20 minutes or until heated through and bubbly. Top with diced pickle, tomatoes, and onions – all your favorite cheeseburger flavors – and dig in!

Make It A Meal

This is a full one-dish dinner on its own, but I sometimes add Green Beans Almondine with Bacon alongside it for a second vegetable on the table.

Since the net carbs stay low here, there’s room for Keto Blueberry Chia Pudding afterward if you want something sweet to close out the meal.

Storage

Store in an airtight container in the fridge for up to 4 days. Reheat in the oven or microwave until hot throughout. This freezes reasonably well, though the cauliflower base can soften slightly on thawing, so texture is best within the first couple of months.

Frequently Asked Questions

WANT EVEN MORE EASY KETO DIET RECIPES?

I’m always in the kitchen creating new recipes, and while some of them are big hits, I get some misses, too. But these are some of my favorite all-time recipes:

• Thick and luscious Salmon Chowder
• Grilled veggies – I love how versatile this recipe is!
• This amazing cauliflower dish
• Meaty sausage Parmigiana