Published January 5, 2026 · Updated June 18, 2026
This cheesy broccoli and cauliflower casserole is everything you want from a comfort-food bake, with one quiet upgrade: six grams of net carbs, no flour, and no breadcrumbs. Tender vegetables get folded into a rich, creamy cheddar sauce and baked until bubbly and golden, proving that a low-carb, diabetic-friendly version gives up nothing on flavor.
Quick Stats
Why This Recipe Works
Low glycemic impact: Broccoli and cauliflower are both non-starchy, cruciferous vegetables that have a minimal effect on blood glucose. At only 6g net carbs per serving, this casserole is designed to be blood-sugar-friendly rather than spike-inducing.
Fiber that does real work: The 3g of fiber per serving helps slow digestion, which may support steadier energy. Cauliflower brings just 3g of carbs per cup and plenty of bulk, so the dish feels generous without the carb load.
Protein and healthy fats for staying power: Sharp cheddar, cream cheese, and heavy cream supply satisfying protein and fat that promote fullness and steady energy. Because the cheese is sharp, you need less of it to get bold flavor.
Nutrient density: Broccoli contains chromium and sulforaphane, compounds associated with better glucose metabolism, while both vegetables are rich in vitamins C and K. The result is comfort food that earns its place in a low-carb routine.
Traditional vs. This Cheesy Broccoli and Cauliflower Casserole
| Feature | Traditional Version | This Recipe |
|---|---|---|
| Net carbs per serving | About 20 to 25g | Just 6g |
| Sauce thickener | Flour-based roux | Cream cheese and heavy cream, no flour |
| Topping | Breadcrumbs | Extra cheese, zero carbs |
| Blood sugar effect | Tends to spike | Designed to stay stable |
| Keto-friendly | No | Yes |
Here is the full recipe with exact measurements, the no-flour cheese sauce method, and complete nutrition.
Cheesy Broccoli Cauliflower Casserole | Keto
Ingredients
Equipment
Method
- Preheat your oven to 375°F (190°C). Lightly grease a 9×13 inch baking dish with butter or cooking spray.
- Bring a large pot of salted water to a boil. Add the broccoli and cauliflower florets and blanch for 3-4 minutes until just tender-crisp. They should still have a slight bite.
- Drain the vegetables in a colander and immediately run under cold water to stop the cooking process. Pat completely dry with paper towels or a clean kitchen towel. This step is crucial to prevent a watery casserole.
- In a medium saucepan over medium heat, melt the butter. Add the heavy cream and cream cheese, whisking until the cream cheese is fully melted and the mixture is smooth, about 2-3 minutes.
- Reduce heat to low. Add 1.5 cups of the shredded cheddar cheese to the cream mixture, stirring constantly until melted and smooth. The sauce should be thick and creamy.
- Stir in the garlic powder, onion powder, black pepper, salt, and paprika (if using). Taste and adjust seasonings as needed.
- Place the dried broccoli and cauliflower in the prepared baking dish. Pour the cheese sauce evenly over the vegetables, using a spatula to gently toss and ensure all pieces are coated.
- Sprinkle the remaining 0.5 cup of shredded cheddar cheese evenly over the top of the casserole.
- Bake uncovered for 25-30 minutes, until the casserole is bubbly around the edges and the cheese on top is melted and lightly golden.
- Remove from the oven and let rest for 5 minutes before serving. This allows the sauce to thicken slightly and makes serving easier.
- Serve hot as a main dish or side. Garnish with fresh herbs like parsley or chives if desired.
Nutrition
Notes
Tried this recipe?
Let us know how it was!Building a few low-carb dinners into the week? This casserole pairs naturally with a pot of hearty keto stews or a batch of chicken avocado lettuce wraps for an easy, blood-sugar-friendly rotation.
Chef Tips for the Best Broccoli and Cauliflower Casserole
Do not overcook the vegetables: Blanch the broccoli and cauliflower only until tender-crisp before baking. Overcooked cruciferous vegetables turn mushy and develop an unpleasant sulfur smell, so a slight bite at this stage is exactly what you want.
Dry the vegetables completely: After blanching, pat them fully dry with paper towels. Excess moisture is the single biggest cause of a watery casserole, because it dilutes the cheese sauce as the dish bakes.
Shred your own cheese: Choose a block of sharp or extra-sharp cheddar and grate it yourself. Pre-shredded cheese is coated with anti-caking agents that keep it from melting into a smooth sauce.
Vary the vegetables: Green beans, asparagus, or Brussels sprouts all work well in place of part of the broccoli or cauliflower. Keep the total vegetable quantity similar so the sauce-to-veggie ratio and the macros hold.
Build flavor without carbs: A pinch of garlic powder, onion powder, or smoked paprika in the cheese sauce adds real depth with no added carbs.
Make it crunchy the keto way: Skip breadcrumbs entirely. A mix of crushed pork rinds and grated Parmesan over the cheese layer before baking gives you a golden, crisp, zero-carb topping.
Storage and Serving Suggestions
Refrigerator storage: Keep covered in an airtight container for up to 5 days. The flavor actually improves after a day as everything melds together.
Freezer storage: The casserole freezes well for up to 3 months. Freeze in individual portions, then thaw overnight in the refrigerator before reheating.
Reheating: Warm in the microwave for 2 to 3 minutes, or in a 350°F oven for 15 to 20 minutes until heated through. A splash of cream brings back the silkiness if it looks dry.
Meal prep strategy: Divide into single-serving containers and reheat through the week for quick, satisfying lunches that hold their texture beautifully.
Complete the meal: Serve it as a vegetarian main, or pair it with protein like Neiman Marcus keto chicken or a simple baked cod and a crisp green salad.
Frequently Asked Questions
Is broccoli and cauliflower casserole keto-friendly?
Yes. With only 6g net carbs per serving and roughly 70% of its calories from fat, this casserole fits a ketogenic diet. The cheese sauce uses cream cheese, heavy cream, and sharp cheddar with no flour at all.
How do I prevent a watery casserole?
Dry the vegetables thoroughly. After blanching, drain them well and pat them completely dry with paper towels, since any leftover moisture dilutes the cheese sauce. Avoid overcooking the broccoli and cauliflower during blanching so they still have a slight bite.
Can I make it dairy-free?
It is difficult, because the cheese sauce is central to the dish. You can experiment with dairy-free cream cheese and vegan cheddar, though the texture and flavor will change. Coconut-based dairy alternatives tend to work better than nut-based ones in savory recipes like this.
Can I add other vegetables?
Absolutely. Green beans, asparagus, Brussels sprouts, or spinach all work well. Keep the total vegetable quantity similar to maintain the sauce-to-veggie ratio and the nutritional profile.
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This casserole is the kind of dish that makes low-carb eating feel effortless rather than restrictive. Make it once, keep portions in the fridge, and you have creamy, cheesy comfort ready whenever the craving hits, all while keeping carbs in check.
Medical Disclaimer: The nutritional information provided in this article is for informational purposes only. While we strive for accuracy, individual responses to foods vary. Always consult with your healthcare provider or registered dietitian about dietary changes.
