When it comes to Keto Broccoli and Cauliflower Au Gratin with Sausage, few dishes capture comfort food and low-carb magic in one dish. Imagine tender broccoli and cauliflower florets baked under a golden, bubbly cheese sauce with perfectly browned sausage slices—every bite creamy, cheesy, and packed with flavor. Whether you’re planning a keto-friendly weeknight dinner or an indulgent low-carb holiday side, this recipe promises both satisfaction and simplicity.
From the first whiff of roasted cheese to the last bite of juicy sausage nestled among crisp vegetables, this gratin elevates everyday keto cooking into something gourmet-worthy. Let’s explore why this dish should be on your table tonight.
Why You’ll Love Keto Broccoli and Cauliflower Au Gratin with Sausage
-
Rich, Creamy Flavor – Heavy cream, cheddar, and Parmesan blend to create a luscious sauce that envelops each vegetable and sausage slice.
-
Low-Carb and Keto-Friendly – Enjoy a comforting, indulgent dish without straying from your keto lifestyle.
-
Time-Saving Prep – Blanching veggies and sautéing sausage is quick; the oven does the rest.
-
Family-Friendly – Picky eaters will devour the cheesy goodness, hidden under a savory topping.
-
High in Protein – Sausage and cheese combine for a satisfying protein boost.
-
Versatile Meal – Serve it as a main dish, side, or even meal prep lunch.
-
Budget-Friendly Ingredients – Simple, affordable vegetables and pantry staples make this recipe easy on the wallet.
-
Customizable Flavor – Swap sausage for bacon or chicken, add herbs, or play with different cheeses.
Ingredients for Keto Broccoli and Cauliflower Au Gratin with Sausage
| Ingredient | Function & Tips |
|---|---|
| 2 cups broccoli florets | Blanching preserves color and crunch. |
| 2 cups cauliflower florets | Combines with broccoli for classic gratin texture. |
| 8 oz sausage, sliced | Provides savory, protein-rich flavor; choose spicy or mild as preferred. |
| 1 cup heavy cream | Forms the creamy base of the cheese sauce. |
| 1 1/2 cups shredded cheddar cheese | Melts smoothly and adds sharp flavor. |
| 1/2 cup grated Parmesan cheese | Adds depth, nutty flavor, and golden topping. |
| 2 cloves garlic, minced | Enhances aroma and taste. |
| 1/2 cup diced onion (optional) | Adds subtle sweetness to the sauce. |
| 2 tbsp butter | Sautéing base and adds richness. |
| 1/2 tsp salt | Enhances all flavors. |
| 1/4 tsp black pepper | Mild heat and flavor balance. |
| 1/4 tsp paprika (optional) | Adds warmth and color. |
Substitutions:
-
Heavy cream → full-fat coconut milk (for dairy-free)
-
Cheddar → Gruyère or mozzarella for milder taste
-
Sausage → turkey or chicken sausage for leaner option
Step-by-Step Instructions for Keto Broccoli and Cauliflower Au Gratin with Sausage
Step 1: Preheat and Prepare
Preheat your oven to 375°F (190°C). Lightly grease a medium baking dish with butter or non-stick spray. This ensures easy cleanup and prevents sticking.
Step 2: Blanch the Vegetables
Bring a large pot of salted water to a boil. Add broccoli and cauliflower florets, blanching for 2–3 minutes to retain color and crunch. Drain and set aside to cool slightly.
Step 3: Cook the Sausage
In a skillet over medium heat, cook the sausage slices until browned and fully cooked, about 5–7 minutes. Remove from heat and set aside.
Step 4: Sauté Garlic and Onion
Melt butter in the same skillet, add minced garlic and diced onions (if using). Sauté 2–3 minutes until soft and fragrant. This step creates a flavorful base for the creamy sauce.
Step 5: Create the Cheese Sauce
Pour in the heavy cream, bringing it to a gentle simmer. Gradually stir in cheddar cheese and half of the Parmesan until smooth. Season with salt, pepper, and paprika.
Step 6: Assemble the Dish
In the prepared baking dish, layer the blanched broccoli and cauliflower with cooked sausage. Pour cheese sauce evenly, gently stirring to coat without breaking the florets.
Step 7: Top and Bake
Sprinkle remaining Parmesan over the top. Bake uncovered for 20–25 minutes until cheese is bubbly and golden brown.
Step 8: Serve and Enjoy
Let the gratin rest 5 minutes before serving. Enjoy the creamy, cheesy goodness while warm.
Pro Tips for Perfect Keto Broccoli and Cauliflower Au Gratin with Sausage
How can I make this dish even creamier?
Add an extra 1/4 cup of heavy cream or a dollop of cream cheese to the sauce. This enriches texture without adding carbs.
Can I use frozen vegetables?
Yes! Thaw and drain frozen broccoli and cauliflower, then pat dry to prevent watery sauce.
How do I prevent sausage from drying out?
Cook over medium heat and remove from skillet just when browned; it will finish cooking in the oven.
Best cheese combinations for keto gratin?
Sharp cheddar + Parmesan is classic, but Gouda or Gruyère adds a gourmet twist.
Best Ways to Serve Keto Broccoli and Cauliflower Au Gratin with Sausage
-
As a main dish with a simple green salad.
-
Paired with garlic butter chicken or grilled salmon.
-
Meal-prepped for low-carb lunches throughout the week.
-
Served alongside Cauliflower Rice or Mashed Cauliflower for extra comfort.
Nutrition (Per Serving)
| Nutrient | Amount |
|---|---|
| Calories | 375 kcal |
| Protein | 18 g |
| Fat | 30 g |
| Carbs | 6 g |
| Fiber | 2 g |
| Net Carbs | 4 g |
| Sodium | 550 mg |
This keto-friendly dish keeps net carbs low while offering a satisfying portion of protein and fats for energy.
Storage & Leftovers
-
Refrigerator: Store in airtight container for 3–4 days.
-
Freezer: Freeze unbaked or baked gratin for up to 2 months.
-
Reheating: Microwave individual portions 1–2 minutes or oven bake at 350°F (175°C) until warm.
FAQ
Is this recipe keto-friendly?
Absolutely! With low-carb vegetables and high-fat cheese, it fits a ketogenic lifestyle.
Can I make it vegetarian?
Yes, replace sausage with sautéed mushrooms or smoked tofu.
Can I prep it ahead of time?
Yes, assemble up to Step 6, cover, and refrigerate for 24 hours before baking.
What sausage is best?
Pork, chicken, or turkey sausage work. Choose low-carb options with minimal fillers.
Can I add herbs or spices?
Fresh thyme, rosemary, or smoked paprika enhance flavor without adding carbs.
Variations
-
Gourmet Keto: Use Gruyère cheese, caramelized onions, and Italian sausage.
-
Spicy Twist: Add crushed red pepper flakes or chorizo.
-
Vegetable Swap: Include zucchini, bell peppers, or asparagus.
-
One-Pan Version: Bake entirely in a cast-iron skillet for rustic presentation.
Conclusion
Keto Broccoli and Cauliflower Au Gratin with Sausage is a versatile, indulgent, and keto-approved recipe that transforms ordinary vegetables into creamy, cheesy perfection. From weeknight dinners to festive holiday tables, this dish is guaranteed to impress