Easy Keto Broccoli Cauliflower Gratin
A creamy low-carb casserole featuring broccoli, cauliflower, and smoked sausage, perfect for weeknight dinners that the family will love.

Indulging in Comfort: A Creamy Keto Delight
There’s something incredibly satisfying about serving a hearty, low-carb dish that the whole family will love, and this Easy Keto Broccoli & Cauliflower Au Gratin with Sausage does just that. With its rich, cheesy sauce and savory sausage, it’s a perfect weeknight dinner option that transforms ordinary vegetables into something extraordinary. Whether you’re on a keto diet or just looking for a delicious way to pack more nutritious ingredients into your meals, this recipe delivers flavor and comfort in every bite.
What Makes This Dish Worth Your Time
When it comes to weeknight dinners, simplicity and flavor are often the top priorities. Here’s why you’ll love this creamy casserole:
- Quick to Prepare
- With just a few simple steps, you can have this dish ready for your family in under an hour.
- Low Carb Goodness
- Ideal for those on a low-carb or keto diet, it satisfies cravings without the guilt.
- Budget-Friendly
- With simple ingredients like broccoli, cauliflower, and sausage, you can keep meal costs down while still enjoying a hearty meal.
- Kid-Approved
- The creamy cheese sauce and tasty sausage are sure to win over even the pickiest eaters!
The Cooking Process Explained
Crafting this mouthwatering casserole is straightforward and fun! Here’s an overview of how you’ll pull it all together:
- Prep Your Oven: Get that oven warming up while you make the filling.
- Brown the Sausage: Achieve a perfect golden color on the sausage for added flavor.
- Make the Cheese Sauce: You’ll create a deliciously creamy sauce that brings everything together.
- Combine and Bake: Mix your veggies and sausage with that heavenly sauce, bake until bubbly, and you’re done!
Gather These Items
Ready to get started? Here’s everything you’ll need to whip up this tasty dish:
- 1 head cauliflower, cut into florets (you can use a pre-chopped bag for convenience)
- 1 head broccoli, cut into florets (briefly steamed or blanched)
- 12 oz smoked sausage, sliced into rounds
- 2 Tbsp butter
- 1 medium onion, finely diced
- 2 garlic cloves, minced
- 8 oz cream cheese, softened
- 1 cup heavy cream
- 2 cups shredded cheddar cheese (or a blend you prefer)
- Salt and freshly ground black pepper, to taste
Feel free to experiment with different cheeses or proteins to make this recipe your own!
Step-by-Step Instructions
Now, let’s dive into the detailed directions to create this scrumptious casserole:
- Preheat your oven to 350°F (175°C) and grease a 9×9-inch baking dish.
- In a large skillet over medium-high heat, brown the sausage slices until they’re golden and slightly crisp around the edges, about 5–7 minutes. Remove and set aside.
- In a saucepan, melt the butter over medium heat. Add the diced onion and cook until softened, about 3–4 minutes. Stir in the garlic and cook for another 30 seconds until fragrant.
- Lower the heat and incorporate the softened cream cheese, stirring until it blends smoothly with the onions. Gradually whisk in the heavy cream, simmering for 3–5 minutes until the sauce thickens slightly.
- Remove the pan from the heat and fold in the shredded cheddar until the sauce is smooth. Season with salt and pepper to your liking.
- In a large bowl, combine the broccoli and cauliflower florets with the browned sausage. Pour the cheese sauce over the mix and toss to ensure everything is evenly coated.
- Transfer the mixture to the prepared baking dish and spread it into an even layer. Bake for 15–20 minutes until the casserole is bubbling and the top is lightly golden. For an extra crispy topping, broil for 1–2 minutes—just keep an eye on it!
- Allow the dish to rest for a few minutes before serving, letting the flavors meld beautifully.

Easy Keto Broccoli & Cauliflower Au Gratin with Sausage
- Prep
- 10 MIN
- Cook
- 30 MIN
- Total
- 40 MIN
- Serves
- 6
01Ingredients
Vegetables and Sausage
Sauce Ingredients
Seasoning
02Method
- Preparation
- Baking
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0 OF 8 DONE03Recipe notes
- 01Garnish with fresh herbs like parsley or chives, pair with a salad for balance, serve with extra melted cheese on top. Store leftovers in an airtight container in the fridge for up to 4 days. Freezing is possible; wrap tightly and use within two months.
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Best Ways to Enjoy It
After you’ve worked your culinary magic, it’s time to serve up this delicious casserole! Here are some creative ideas to make your meal special:
- Garnish with Fresh Herbs
- Sprinkle chopped parsley or chives on top for a fresh touch.
- Pair with a Salad
- A side of mixed greens with a light vinaigrette is a perfect complement to this rich dish.
- Serve with Extra Cheese
- If you’re a cheese lover, consider adding more melted cheese on top before serving.
Storage and Reheating Tips
If you have any leftovers (which is a big if!), here’s how to handle them:
Refrigerate: Store leftovers in an airtight container in the fridge for up to 4 days.
Reheat: For the best texture, reheat in the oven at 350°F until warmed through, or in the microwave if you’re short on time.
Freezing: You can freeze the casserole before baking it. Just wrap it tightly, and it will be good for up to 2 months. When ready to eat, thaw it in the fridge overnight and bake as directed.
Creative Twists
Feeling adventurous? Here are some variations to shake things up:
- Change the Protein
- Try substituting the smoked sausage with chicken or turkey sausage for a lighter version.
- Add Spice
- Incorporate jalapeños or a dash of hot sauce in the cheese sauce for a kick.
- Swap Cheese Types
- Use mozzarella for a stringy texture or a blend like pepper jack for added flavor.
FAQ
How long does it take to make this recipe?
From start to finish, this delicious casserole takes about 30-40 minutes, making it perfect for a quick weeknight dinner.
Can I prepare this dish ahead of time?
Absolutely! You can assemble the casserole, cover it, and refrigerate it for a day before baking. Just add a few extra minutes to the baking time if baking straight from the fridge.
Is this recipe suitable for freezing?
Yes! It freezes well. Just ensure it’s tightly wrapped and use it within two months.
Conclusion
With its creamy texture and delightful flavor, the Easy Keto Broccoli & Cauliflower Au Gratin with Sausage is a dish that everyone will love, making it an ideal addition to your low-carb meal rotation. Give it a try for your next family dinner and see how quickly it becomes a favorite! For more ideas, check out Keto Broccoli and Cauliflower Au Gratin With Sausage and my Indulgent Keto Broccoli and Cauliflower Au Gratin With Sausage.
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