Baked Keto Cauliflower Mac and Cheese

When you’re eating low carb or grain-free, sometimes you just want a big scoop of creamy, cheesy comfort food. This Baked Keto Cauliflower Mac and Cheese gives you everything you love about traditional baked mac and cheese—rich cheese sauce, tender bites, and a hot, bubbly casserole—without the pasta.

Instead of macaroni, we’re using fresh cauliflower florets and coating them in a creamy cheddar cheese sauce made with cottage cheese and half-and-half. The cottage cheese might sound unexpected, but once blended smooth it creates an incredibly creamy sauce without needing flour or a traditional roux.

And unlike many cauliflower mac and cheese recipes, you don’t need to roast the cauliflower first. The trick is to lightly steam it until just barely tender, rather than cooking it completely. It finishes cooking in the oven without turning to mush or releasing a ton of water into your cheese sauce.

The result is an easy keto cauliflower mac and cheese that’s naturally gluten-free, low carb, grain-free, and every bit worthy of comfort-food status.

Why You’ll Love This Keto Cauliflower Mac and Cheese

• Low carb and grain-free: Cauliflower replaces traditional macaroni while still giving you plenty of cheesy goodness in every bite.
• No flour or roux: The creamy cheese sauce thickens without wheat flour or cornstarch.
• Extra creamy: Blending cottage cheese with heavy cream gives the sauce a smooth, rich consistency.
• Easy to make: There aren’t any complicated techniques or hard-to-find keto ingredients in the casserole itself.
• Family-friendly: You don’t have to be following a keto diet to appreciate cauliflower covered in bubbling cheddar cheese.
• Perfect for holidays: It’s an especially good low-carb side dish when everyone else is loading their plates with traditional mac and cheese.

What Is Cauliflower Mac and Cheese?

Cauliflower mac and cheese is exactly what it sounds like: mac and cheese without the macaroni.

Small cauliflower florets take the place of pasta and are combined with a rich cheese sauce before being baked until hot and bubbly.

Obviously, I’m not going to tell you cauliflower magically becomes macaroni. It doesn’t.

But cauliflower’s mild flavor works extremely well with cheese, and when the florets are cooked properly, they retain enough texture to give you a satisfying bite instead of turning into cauliflower mush.

For me, that’s the secret to vegetable swaps. I don’t need cauliflower to pretend it’s pasta. I just need the finished dish to be delicious enough that I don’t miss the pasta.

And this one is.

Ingredients You’ll Need

One of the best things about this low carb cauliflower mac and cheese is the relatively short ingredient list.

Fresh Cauliflower

I recommend starting with a large head of fresh cauliflower, cut into small, fairly uniform florets.

Keeping the pieces relatively small gives you a little cauliflower and plenty of cheese sauce in each bite—the closest approximation to the experience of eating traditional mac and cheese.

Fresh cauliflower also gives you much more control over the texture than frozen cauliflower.

Cottage Cheese

Cottage cheese is my secret weapon in this recipe.

Before you panic about cottage cheese curds in your mac and cheese, we’re putting it in the blender.

Once blended, cottage cheese becomes wonderfully smooth and creamy and creates the base of our cheese sauce without needing flour.

Heavy Cream

Heavy Cream helps thin the blended cottage cheese just enough to create a pourable cheese sauce while keeping everything rich and creamy. Use Half-N-Half, if desired.

Cheddar Cheese

Cheddar gives this casserole that familiar mac-and-cheese flavor we’re looking for.

I prefer shredding cheese from a block whenever possible. It generally melts more smoothly because packaged shredded cheeses can contain anti-caking ingredients.

Sharp cheddar will give you a stronger flavor, while mild cheddar makes the casserole a little more mellow. Use whichever you prefer—or combine the two.

Seasonings

A simple combination of dry mustard, white pepper, sea salt, garlic powder, and paprika gives the cheese sauce much more flavor than cheese alone.

Don’t skip the dry mustard. It’s one of those classic mac-and-cheese ingredients that doesn’t make the finished dish taste like mustard; it simply makes the cheddar taste even cheesier.

The Secret to Cauliflower Mac and Cheese That Isn’t Watery

If you’ve made cauliflower casseroles before, you’ve probably experienced the puddle of liquid that can mysteriously appear at the bottom of the baking dish.

The problem is usually overcooking the cauliflower before assembling the casserole.

Cauliflower contains a lot of water. If you boil it until completely tender—or steam it to the point that it’s already soft—it will continue cooking in the oven and release additional moisture.

For this recipe, steam your cauliflower for only about 5 minutes.

You’re looking for cauliflower that’s beginning to become tender but is still slightly crisp. Remember, it’s going to continue cooking when the casserole goes into the oven.

My Best Tips for Avoiding Watery Cauliflower Mac and Cheese

1. Use fresh cauliflower. Frozen cauliflower generally releases more moisture as it cooks.
2. Don’t boil it. Light steaming gives you much better control.
3. Don’t over-steam it. Five minutes is plenty for small florets.
4. Drain off any excess moisture. If your cauliflower seems wet after steaming, let it sit for a few minutes before adding the sauce.
5. Keep your florets similar in size. They’ll cook much more evenly.

How to Make Baked Keto Cauliflower Mac and Cheese

Making this casserole is simple, but there are a few steps that make a big difference in the finished texture.

Start by cutting your fresh cauliflower into small florets and lightly steaming them until they’re just beginning to become tender. Resist the temptation to cook them completely.

While the cauliflower is steaming, blend the cottage cheese, half-and-half, and seasonings until completely smooth.

Transfer the blended mixture to a saucepan and gently heat it before stirring in the shredded cheddar. Keep the heat low while the cheese melts. High heat can cause cheese sauces to become grainy or separate.

If your cheese sauce isn’t perfectly silky after the cheddar melts, there’s an easy fix: carefully transfer it back to the blender and give it another quick blend.

If you love ridiculously easy low-carb sauces, you’ll also want to try my 3 Ingredient Low-Carb Blender Alfredo Sauce.

Next, toss the lightly steamed cauliflower with the warm cheese sauce, transfer everything to your casserole dish, and bake until hot and bubbly.

You’ll find the exact ingredient amounts, temperatures, and baking times in the recipe card below.

Optional Keto Mac and Cheese Toppings

I’m a big believer that the crispy top is one of the best parts of baked mac and cheese.

Fortunately, skipping traditional breadcrumbs doesn’t mean you have to skip the crust.

Try topping your cauliflower mac and cheese with:

• Additional shredded cheddar
• My Low-Carb Breading Mix {Primal & Keto friendly}
• Crushed pork rinds
• Grated Parmesan cheese
• A combination of Parmesan and low-carb breading
• Crispy crumbled bacon

You can also leave the casserole completely untopped. The cheese sauce will still get wonderfully bubbly around the edges.

Easy Cauliflower Mac and Cheese Variations

Once you have the basic recipe down, it’s easy to change it up.

Add Bacon

Fold cooked, crumbled bacon into the cauliflower before baking for a smoky bacon cauliflower mac and cheese.

Add Broccoli

Replace some of the cauliflower with lightly steamed broccoli for a cheesy broccoli-cauliflower casserole.

Make It Extra Cheesy

Use a combination of cheddar, Monterey Jack, Gruyère, or smoked Gouda.

Just make sure the majority is a good melting cheese so your sauce stays creamy.

Add Jalapeños

Chopped fresh or pickled jalapeños add a little heat and are especially delicious with sharp cheddar.

Add Wild Mushrooms

If it’s mushroom season, sautéed wild mushrooms are absolutely delicious folded into this casserole.

Chanterelles are especially good with a sharp cheese sauce. If you’re interested in gathering your own, read my Guide to Foraging Wild Chanterelle Mushrooms before heading into the woods.

Never eat a wild mushroom unless you are 100% confident in its identification.

What to Serve with Cauliflower Mac and Cheese

This cheesy cauliflower casserole is rich enough that I like pairing it with a fairly simple protein.

It’s delicious alongside roasted chicken or turkey, Easy Sous Vide Steak Recipe, Grilled Pork Shoulder Steak, meatloaf, burgers, sausages, or even my Keto Steak Nuggets.

You can also serve it as part of a bigger low-carb comfort-food dinner alongside my Cheesy Skillet Zucchini Lasagna.

And although I originally created this as a side dish, you can easily turn it into dinner. Add leftover chicken, ham, bacon, or another cooked protein and you’ve got a hearty low-carb casserole.

Can You Make Cauliflower Mac and Cheese Ahead of Time?

Yes, which makes this recipe especially convenient for holidays and entertaining.

You can prepare the cauliflower and cheese sauce, assemble the casserole, cover it tightly, and refrigerate it until you’re ready to bake.

For the best texture, I prefer making it no more than one day ahead.

When baking directly from the refrigerator, allow a little extra cooking time since the entire casserole will be starting cold.

If you’re using a crunchy topping, wait and add it immediately before the final uncovered portion of baking.

How to Store and Reheat Leftovers

Store leftover keto cauliflower mac and cheese in an airtight container in the refrigerator for up to 3 to 4 days.

For individual portions, reheating gently in the microwave works just fine. For a larger amount, cover the casserole and reheat it in a 325°F to 350°F oven until warmed through.

Avoid overheating leftovers. Just like any dairy-based cheese sauce, excessive heat can cause the sauce to separate.

Can You Freeze Cauliflower Mac and Cheese?

Technically you can, but I don’t recommend it.

Both cooked cauliflower and dairy-based cheese sauces can change texture after freezing and thawing. The cauliflower may become softer and release additional water while the cheese sauce can separate.

This recipe is much better enjoyed freshly baked or reheated from the refrigerator.

Frequently Asked Questions

Is Cauliflower Mac and Cheese Keto?

Cauliflower is significantly lower in carbohydrates than traditional macaroni, making cauliflower mac and cheese a popular alternative for people following low-carb and ketogenic diets.

The exact carbohydrate count per serving will depend on the specific ingredients and portion size, so refer to the nutrition information in the recipe card for this recipe.

Is Cauliflower Mac and Cheese Gluten-Free?

This recipe is naturally gluten-free as written, provided all of the individual ingredients and any optional topping you use are gluten-free.

Traditional breadcrumb toppings are not gluten-free, so be sure to use a gluten-free or low-carb alternative.

Does Cauliflower Mac and Cheese Taste Like Regular Mac and Cheese?

It tastes like cauliflower with a deliciously creamy mac-and-cheese-style cheddar sauce—and I think that’s a good thing!

Cauliflower doesn’t have the same texture or flavor as pasta, but its mild flavor makes it an excellent vehicle for cheese sauce.

Why Is My Cauliflower Mac and Cheese Watery?

The most common culprit is overcooked cauliflower. Steam the florets only until they’re beginning to become tender but remain slightly crisp before going into the casserole.

Frozen cauliflower can also contribute excess moisture.

How Do You Thicken Cauliflower Mac and Cheese Without Flour?

You don’t need a traditional flour-based roux for this recipe. Blended cottage cheese provides body and creaminess, while melted cheddar thickens the sauce further.

Can I Use Frozen Cauliflower?

Fresh cauliflower is my first choice because frozen cauliflower tends to contain and release more water.

If frozen is all you have, avoid overcooking it and remove as much excess moisture as possible before adding the cheese sauce.

Can I Use Pre-Shredded Cheese?

Yes, but freshly shredded cheddar generally melts more smoothly. Pre-shredded cheeses often contain anti-caking ingredients that can affect the texture of a cheese sauce.

What Kind of Cheese Is Best for Cauliflower Mac and Cheese?

Cheddar is my favorite because it gives you that familiar mac-and-cheese flavor. Sharp cheddar provides the strongest flavor, but mild or medium cheddar work, too.

You can also replace a portion of the cheddar with Gruyère, Monterey Jack, Gouda, or another good melting cheese.

My Tips for the Best Keto Cauliflower Mac and Cheese

Don’t overcook your cauliflower. This is probably the single most important tip in the entire recipe. It should still have some bite when it goes into the casserole.

Blend the cottage cheese completely smooth. Nobody will know it’s there, but you’ll get all the creamy goodness it brings to the sauce.

Keep the heat low when melting the cheddar. Cheese doesn’t appreciate being blasted with high heat.

Shred your own cheese when you can. It melts better and gives the sauce a smoother texture.

Season your cheese sauce before baking. Cauliflower is mild and needs enough seasoning to stand up to all that dairy.

Let it rest before digging in. Giving the casserole a few minutes out of the oven allows the bubbling sauce to settle and cling to the cauliflower.

If you’ve been missing baked mac and cheese since going grain-free or low carb, this Baked Keto Cauliflower Mac and Cheese belongs on your comfort-food list. It’s creamy, cheesy, easy to make, and doesn’t require pretending that cauliflower is actually pasta.

Sometimes a vegetable covered in a ridiculous amount of cheese is exactly what dinner needs.