Name: Keto Broccoli and Cauliflower Au Gratin with Sausage Recipe
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Cuisine: American
Ingredients: 3 cups Cauliflower Florets (lightly steamed); 2 cups Broccoli Florets (lightly steamed); 12 ounce Sliced Smoked Sausage; 2 tbsp Butter; 1/2 Onion (diced); 2 tsp Minced Garlic; 2 ounces Cream Cheese (softened); 2/3 cup Heavy Whipping Cream; 1 1/2 cups Shredded Cheddar Cheese

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If you’re searching for the ultimate comfort meal that fits right into your low-carb lifestyle, this Keto Broccoli and Cauliflower Au Gratin with Sausage might just be your new favorite. Brimming with tender veggies, rich cheddar cheese sauce, and savory smoked sausage, this dish is the perfect blend of creamy, hearty, and totally satisfying. It comes together easily, fills your kitchen with incredible aromas, and stays true to your keto goals—all while offering the kind of meal that’ll have everyone at the table asking for seconds!

Keto Broccoli and Cauliflower Au Gratin with Sausage Recipe - Recipe Image

Ingredients You’ll Need

You’ll be amazed at how a small lineup of simple ingredients transforms into the luxurious, bubbly goodness of this Keto Broccoli and Cauliflower Au Gratin with Sausage. Each staple brings its own splash of flavor and texture, creating a gorgeous, golden bake you’ll want to make again and again.

Cauliflower Florets (3 cups, lightly steamed): The mellow flavor and tender bite are perfect in this gratin, soaking up all the cheesy sauce.
Broccoli Florets (2 cups, lightly steamed): Broccoli adds color and an earthy note that tastes incredible with the sausage.
Sliced Smoked Sausage (12 ounces): Savory, rich, and just a little smoky, sausage brings protein and punch to the party.
Butter (2 tablespoons): Adds richness and helps bring out the natural sweetness in the onions and garlic.
Onion, diced (1/2): For wonderful depth and savory sweetness as a base for the sauce.
Minced Garlic (2 teaspoons): Essential for that addictive aroma and flavor boost.
Cream Cheese, softened (2 ounces): Makes the sauce extra creamy with just a hint of tang.
Heavy Whipping Cream (2/3 cup): The backbone of every luscious keto cheese sauce—smooth and totally indulgent.
Shredded Cheddar Cheese (1 1/2 cups): Melty, sharp, and golden, cheddar is classic for a gratin and forms the gooey crown on top.
Salt and Pepper, to taste: Just a pinch or two is all you need to balance and amplify every flavor in the dish.

How to Make Keto Broccoli and Cauliflower Au Gratin with Sausage

Step 1: Preheat Your Oven

Get started by preheating your oven to 350 degrees Fahrenheit. This gives you time to prep your ingredients and ensures your Keto Broccoli and Cauliflower Au Gratin with Sausage will bake evenly and come out hot, bubbly, and perfect.

Step 2: Brown the Sausage

Heat a skillet over medium-high heat and add your sliced smoked sausage. Sauté the slices until they’re beautifully seared and caramelized on both sides. This quick browning adds tons of flavor, and the crispy edges will make your gratin extra irresistible. Once done, set the sausage aside.

Step 3: Sauté Onions and Garlic

In a separate pot, melt the butter over medium heat. Add in the diced onions and cook until they’re soft and translucent—it’s the secret to a deeply savory base. Stir in the minced garlic and sauté for just 30 seconds more, being careful not to let it burn.

Step 4: Make the Cheese Sauce

Drop in the softened cream cheese and stir until it melts into the onions and garlic. Slowly pour in the heavy whipping cream, whisking constantly to prevent any lumps. Let this mixture simmer gently over medium-low heat until it thickens to a silky sauce.

Step 5: Add the Cheddar

Now comes the cheddar! Stir in the shredded cheddar cheese a handful at a time until it’s fully melted and the sauce is smooth, golden, and glossy. Season with salt and pepper to taste so every bite of your Keto Broccoli and Cauliflower Au Gratin with Sausage is perfectly balanced.

Step 6: Combine Everything

In a large mixing bowl, gently toss the steamed cauliflower, broccoli, and browned sausage. Pour the cheesy sauce over the top and fold to combine—make sure everything is beautifully coated so every forkful is packed with flavor.

Step 7: Bake

Spread the mixture evenly into a 9×9-inch baking dish. Bake uncovered for 15-20 minutes, until the top is bubbling and starting to turn golden brown. You’ll know it’s ready when the kitchen smells like cheesy heaven and the cheese is delightfully melty.

How to Serve Keto Broccoli and Cauliflower Au Gratin with Sausage

Garnishes

A finishing touch can make all the difference. Consider topping your hot gratin with a sprinkle of fresh chopped parsley or chives for a bit of color and a pop of freshness. If you love a little zing, a few cracks of fresh black pepper or even a tiny pinch of crushed red pepper flakes can really wake up the flavors.

Side Dishes

This Keto Broccoli and Cauliflower Au Gratin with Sausage is satisfyingly hearty on its own, but it also makes a wonderful centerpiece for a larger meal. Pair it with a crisp green salad tossed in a tangy vinaigrette, some sautéed greens like spinach or kale, or a light cucumber and tomato salad to balance out the rich and creamy main dish.

Creative Ways to Present

Get playful with presentation by scooping the hot gratin into mini cast-iron skillets or ramekins for individual servings. You can also make little “stacks” using cooking rings for a fancier dinner, or serve over a nest of sautéed zucchini noodles for an extra veggie flourish. Let your imagination run wild—the vivid colors and bubbly cheese already make this dish a showstopper!

Make Ahead and Storage

Storing Leftovers

If you’re lucky enough to have leftovers of your Keto Broccoli and Cauliflower Au Gratin with Sausage, transfer them to an airtight container and refrigerate. The flavors deepen overnight, making it a delicious next-day lunch that reheats beautifully.

Freezing

This gratin freezes quite well, especially if you store it in tightly sealed containers to prevent freezer burn. For best results, freeze in individual portions and thaw overnight in the fridge before reheating, so the creamy sauce stays luscious and the veggies maintain their texture.

Reheating

Reheating is simple! Either microwave portions until hot or bake, covered with foil, in a 350-degree oven until bubbly again. If the sauce seems a bit thick after refrigeration, stir in a splash of cream to help revive its creamy texture.

FAQs

Can I use a different type of sausage in this recipe?

Absolutely! Any cooked sausage you love—such as andouille, kielbasa, or even chicken sausage—works great in this Keto Broccoli and Cauliflower Au Gratin with Sausage. Each variety brings its own unique flavor, so don’t be afraid to experiment.

Is it possible to make this recipe vegetarian?

Yes, you can easily make a vegetarian version. Simply omit the sausage and add more veggies, like bell peppers or mushrooms, for extra heartiness. You’ll still get all the creamy, cheesy satisfaction with a lovely plant-based twist.

What cheese alternatives could I use?

Cheddar is classic, but you can swap in Gruyère, Monterey Jack, or even a blend of your favorite shredded cheeses. Just make sure whichever you choose melts well, so your Keto Broccoli and Cauliflower Au Gratin with Sausage stays gooey and rich.

Can I make this in advance?

Definitely! Assemble the dish completely, cover, and refrigerate for up to 24 hours before baking. When you’re ready, let it sit at room temperature for 20-30 minutes, then bake as directed. Perfect for entertaining or meal prepping a busy weeknight!

How do I keep the gratin from getting watery?

Lightly steaming the broccoli and cauliflower is key—they should be just tender, not mushy. Avoid overcooking, and be sure to drain them well before mixing with the sauce. This helps keep your Keto Broccoli and Cauliflower Au Gratin with Sausage creamy, not watery.

Final Thoughts

There’s just something magical about a bubbling dish of Keto Broccoli and Cauliflower Au Gratin with Sausage coming out of the oven. It’s pure comfort food made the keto way, and I hope this recipe finds a regular spot at your table. Give it a try—you might just fall in love at first bite!

Keto Broccoli and Cauliflower Au Gratin with Sausage Recipe

★★★★★

4.8 from 5 reviews

Author: Olivia
Total Time: 35 minutes
Yield: 4 servings 1x
Diet: Keto

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Description

Indulge in this rich and creamy Keto Broccoli and Cauliflower Au Gratin with Sausage. A comforting and flavorful low-carb dish that is perfect for a cozy dinner.

Ingredients

Scale

Cauliflower Au Gratin:

3 cups Cauliflower Florets (lightly steamed)

Broccoli Au Gratin:

2 cups Broccoli Florets (lightly steamed)

Sausage:

12 ounce Sliced Smoked Sausage

Cheese Sauce:

2 tbsp Butter
1/2 Onion (diced)
2 tsp Minced Garlic
2 ounces Cream Cheese (softened)
2/3 cup Heavy Whipping Cream
1 1/2 cups Shredded Cheddar Cheese

Instructions

Preheat the oven: Preheat the oven to 350 degrees.
Sear the sausage: In a skillet over medium-high heat, sear the sliced sausage. Remove and set aside.
Prepare the cheese sauce: In a pot over medium heat, melt butter. Saute onions until softened, then add garlic. Stir in cream cheese until melted. Pour in heavy whipping cream and whisk until well combined. Simmer until thickened.
Add cheese and season: Stir in shredded cheese, season with salt and pepper.
Combine ingredients: In a mixing bowl, mix cauliflower, broccoli, and sausage. Pour cheese sauce over and stir to combine.
Bake: Spread the mixture in a 9×9 baking dish and bake for 15-20 minutes.

Prep Time: 15 minutes
Cook Time: 20 minutes
Category: Main Dish
Method: Baking
Cuisine: American