Creamy, cheesy, and packed with savory sausage, this Keto Broccoli and Cauliflower Au Gratin is a low-carb comfort food masterpiece. Perfect for holidays, meal prep, or weeknight dinners!
Let’s be real: keto meals can sometimes feel like a never-ending parade of bacon and avocado. Enter this Keto Broccoli and Cauliflower Au Gratin With Sausage—a dish so decadent, your carb-loving friends will beg for the recipe. Combining tender veggies, crispy sausage, and a velvety cheese sauce, this casserole is the ultimate crowd-pleaser. Whether you’re meal-prepping, hosting a dinner party, or just craving comfort food without the guilt, this recipe is your new BFF. Ready to make your taste buds (and your macros) happy? Let’s dive in.
What Makes This Keto Broccoli and Cauliflower Au Gratin Special?
This isn’t your grandma’s gratin (no offense, Grandma). Here’s why it stands out:
- Under 5g net carbs per serving but tastes like a cheat meal.
- Meal prep superstar: Tastes even better the next day!
- No weird ingredients: Uses pantry staples like heavy cream, cheddar, and garlic.
- Versatile AF: Swap proteins, cheeses, or veggies to suit your mood.
- Crispy topping hack: A mix of pork rinds and Parmesan for that chef’s kiss crunch.
Ingredient Notes: Why Quality Matters
Don’t skimp here—your taste buds will thank you:
- Sausage: Opt for sugar-free, grass-fed sausage
- Cheese: Sharp cheddar adds depth, but Gruyère or Gouda work for a fancy twist.
- Heavy cream: Skip the half-and-half—this is keto, after all.
- Veggies: Fresh broccoli and cauliflower steam best, but frozen works in a pinch (thaw first!).
- Pork rinds: Crushed Salt & Vinegar flavor adds a tangy kick (trust me).
How To Make Keto Broccoli and Cauliflower Au Gratin
- Step 1: Veggie Prep: Steam broccoli and cauliflower until just tender (nobody likes mushy veggies). Pro tip: Toss them in ice water post-steam to lock in color!
- Step 2: Sausage Shenanigans: Brown the sausage in a skillet, then drain excess grease (save it for frying eggs tomorrow!).
- Step 3: Cheese Sauce Magic: Melt butter, whisk in heavy cream and garlic, then stir in shredded cheese off the heat to avoid grainy sauce.
- Step 4: Assemble & Bake: Layer veggies, sausage, and sauce in a casserole dish. Top with crushed pork rinds and Parmesan. Bake at 375°F until bubbly and golden (about 20 mins).
WANT TO SAVE THIS RECIPE?
Pro Tips:
- Crispier topping? Broil for 2-3 minutes at the end.
- Meal prep hack: Assemble unbaked and refrigerate for up to 2 days.
- Gluten-free? Already is! No flour in this cheese sauce.
Storage & Reheating: Keep It Fresh, Keep It Tasty
- Fridge: Store in an airtight container for up to 5 days.
- Freezer: Freeze before baking for up to 3 months. Thaw overnight before cooking.
- Reheat: Microwave for quick bites, or bake at 350°F for 15 mins to revive the crispy topping.
Variations & Substitutions: Make It Your Own
- Vegetarian: Swap sausage for sautéed mushrooms or Beyond Meat crumbles.
- Dairy-free: Use coconut cream and nutritional yeast instead of heavy cream/cheese.
- Bacon lovers: Add crumbled bacon to the topping (because why not?).
- Spice it up: Throw in jalapeños or red pepper flakes.
This gratin isn’t just a side dish—it’s a main character. With its creamy texture, smoky sausage, and crispy topping, it’s the ultimate keto comfort food that’s easy enough for Tuesday nights but fancy enough for Thanksgiving. Plus, it’s beginner-friendly and endlessly customizable. Your oven’s waiting…
FAQ
Can I use frozen broccoli and cauliflower?
Absolutely! Thaw and pat dry to avoid a watery casserole.
How many carbs per serving?
Just 4g net carbs!
Can I freeze leftovers?
Yep! Freeze individual portions for quick keto lunches.
What pairs well with this dish?
Try our Garlic Butter Steak Bites or a simple arugula salad.
Can I omit pork rinds?
Sure! Use crushed almonds or skip for a softer topping.
Keto Broccoli and Cauliflower Au Gratin With Sausage
Ingredients
For the Vegetable Base
- 3 cups cauliflower florets about 1 medium head, cut into bite-sized pieces
- 3 cups broccoli florets about 2 medium crowns, cut into bite-sized pieces
- 12 ounces smoked sausage sliced into ¼-inch rounds (kielbasa or andouille work well)
For the Creamy Cheese Sauce
- 3 tablespoons unsalted butter
- ½ medium yellow onion finely diced
- 3 cloves garlic minced
- 8 ounces cream cheese softened and cut into cubes
- 1 cup heavy whipping cream
- 2 cups sharp cheddar cheese freshly shredded (pre-shredded has additives that affect melting)
- ½ teaspoon sea salt or to taste
- ¼ teaspoon freshly ground black pepper
- ¼ teaspoon paprika optional
Optional Garnish
- 2 tablespoons fresh chives or green onions thinly sliced
- Extra shredded cheddar for topping
Instructions
- Preheat and Prepare: Set your oven to 350°F (175°C). Lightly grease a 9×9-inch baking dish with butter or cooking spray.
- Steam Vegetables: Steam the cauliflower and broccoli florets until just tender but still firm, about 5-6 minutes. This can be done in a steamer basket over boiling water or in the microwave with a splash of water in a covered dish. Once steamed, drain thoroughly and pat dry with paper towels to remove excess moisture. This prevents the sauce from becoming watery.
- Brown Sausage: In a large skillet over medium-high heat, cook the sliced sausage until lightly browned on both sides, about 4-5 minutes. Transfer to a paper towel-lined plate to remove excess grease.
- Prepare Cheese Sauce Base: In the same skillet (no need to clean it), reduce heat to medium and add butter. Once melted, add the diced onion and sauté until translucent, about 3-4 minutes. Add minced garlic and cook for another 30 seconds until fragrant, being careful not to burn it.
- Create Creamy Sauce: Add the cream cheese to the skillet and stir until mostly melted. Pour in the heavy cream and whisk continuously until smooth. Allow the mixture to simmer gently for 2-3 minutes until it begins to thicken slightly.
- Add Cheese: Reduce heat to low and gradually add the shredded cheddar cheese, stirring constantly until completely melted and the sauce is smooth. Season with salt, pepper, and paprika if using. Taste and adjust seasonings as needed.
- Combine Components: In a large mixing bowl, gently combine the steamed vegetables and browned sausage. Pour the cheese sauce over the mixture and fold everything together until evenly coated.
- Bake: Transfer the mixture to the prepared baking dish, spreading it evenly. If desired, sprinkle additional shredded cheese on top. Bake uncovered for 15-20 minutes until bubbly around the edges and lightly golden on top.
- Rest and Serve: Allow the casserole to rest for 5 minutes before serving. This helps the sauce set slightly. Garnish with fresh chives or green onions if desired.
