This Keto Veggie Casserole with Cauliflower and Broccoli is creamy, cheesy, comforting, and packed with tender vegetables. Cauliflower and broccoli are coated in a rich, savory cheese sauce before being baked until bubbling and beautifully golden on top. It’s an easy low-carb, highprotein-friendly side dish or light meal that makes vegetables feel wonderfully indulgent.
Can This Keto Veggie Casserole Support Weight Loss Goals?
It can fit into a balanced weight-conscious eating pattern because cauliflower and broccoli provide volume, fiber, and nutrients without contributing a large amount of carbohydrate. Using a moderate amount of cheese and cream keeps the dish satisfying while allowing portion control. For a more filling meal, pair it with lean chicken, turkey, fish, or another protein-rich food. As always, overall portions and the rest of the day’s meals matter more than any single recipe.
Does Keto Veggie Casserole with Cauliflower and Broccoli Fit a Highprotein Lifestyle?
This casserole is low-carb and highprotein-friendly, although the vegetables themselves are not especially high in protein. Cheddar cheese, Parmesan, cream cheese, and Greek yogurt contribute protein while creating the creamy sauce. One serving provides approximately 13 g protein and 8 g net carbs. Pairing it with grilled chicken or another lean protein can turn it into a more substantial highprotein meal.
Why This Recipe is Special
- Keto-friendly: Cauliflower and broccoli replace traditional starchy casserole ingredients.
- Cheesy and comforting: A creamy cheese sauce makes every bite rich and satisfying.
- Vegetable-packed: Two nutritious low-carb vegetables provide color, texture, and flavor.
- Easy to prepare: Simple ingredients and straightforward baking make this a practical side dish.
- Protein-friendly: Dairy ingredients add protein while keeping the casserole creamy.
My Personal Experience
- The roasted edges are my favorite part.
Baking the casserole until the top turns golden creates delicious caramelized edges.
They add a wonderful contrast to the creamy vegetables underneath. - Cauliflower absorbs the cheese sauce beautifully.
Its mild flavor allows the cheddar, garlic, and herbs to stand out.
The result is rich without needing complicated seasonings. - Broccoli adds the perfect texture.
Slightly tender florets provide a fresh vegetable bite alongside the soft cauliflower.
Keeping them from overcooking prevents the casserole from becoming mushy. - A little Parmesan makes the topping extra flavorful.
It creates a savory, browned finish as the casserole bakes.
The nutty flavor complements the cheddar and vegetables perfectly.
Perfect For
This casserole is perfect for keto dinners, low-carb meal plans, family dinners, holiday tables, Sunday dinners, weeknight side dishes, meal prep, potlucks, vegetarian meals, and cozy comfort-food occasions. Serve it alongside roasted chicken, steak, turkey, or fish for a complete protein-focused dinner.
Why You’ll Love This Recipe
- Creamy and cheesy
The rich cheese sauce coats every piece of cauliflower and broccoli.
A golden Parmesan-cheddar topping makes it even more irresistible. - Low-carb-friendly
There is no pasta, rice, flour, or potato in the casserole.
Cauliflower and broccoli keep the recipe satisfying while keeping carbohydrates relatively low. - Easy vegetable side dish
The vegetables are combined with the sauce and baked in one dish.
It’s an effortless way to make a vegetable-heavy meal feel special. - Protein-friendly
Greek yogurt and cheese contribute protein to every serving.
Add grilled chicken or turkey to create an even more protein-focused meal. - Great for leftovers
The casserole reheats well and remains creamy when warmed gently.
This makes it convenient for lunch or dinner meal prep.
Common Mistakes to Avoid
- Not draining the vegetables: Excess water can make the cheese sauce thin and watery.
- Overcooking the broccoli and cauliflower: They should be tender but still firm enough to hold their shape.
- Using too much cream: Excess liquid can prevent the casserole from setting properly.
- Skipping the final browning: A few extra minutes in the oven creates the flavorful golden topping.
Required Equipment
- Large pot or steamer basket — quickly softens the vegetables while maintaining their structure.
- Large mixing bowl — provides enough room to combine the vegetables and cheese sauce.
- 9 × 13-inch baking dish — spreads the casserole evenly for consistent baking.
- Small saucepan — creates a smooth, lump-free cheese sauce.
- Whisk — blends the dairy ingredients into a creamy sauce.
- Rubber spatula — gently combines the vegetables without breaking them apart.
Storage Instructions
Allow the casserole to cool before transferring leftovers to an airtight container, or cover the baking dish tightly with foil or a suitable lid.
Refrigerate for up to 3–4 days.
For longer storage, portion the cooled casserole into freezer-safe containers and freeze for up to 2 months. Thaw overnight in the refrigerator for the best texture.
Reheat individual portions in the microwave in 30–60 second intervals, or warm the entire casserole in a 350°F (175°C) oven for approximately 15–20 minutes, until heated through.
For a highprotein-friendly meal, serve reheated portions with grilled chicken, turkey, fish, or another lean protein.
Recipe Details
Preparation Time: 15 minutes
Cooking Time: 30 minutes
Total Time: 45 minutes
Servings: 6
Best Season: All-season
Total Calories: Approximately 255 calories per serving
Short Description
This Keto Veggie Casserole combines tender cauliflower and broccoli with a rich, creamy cheddar cheese sauce.
A golden Parmesan topping adds savory flavor and irresistible texture to every serving.
It’s a comforting low-carb, protein-friendly vegetable casserole that’s perfect for family dinners and meal prep.
📝 Ingredients
For the Vegetables
- 4 cups (400 g) cauliflower florets
- 4 cups (360 g) broccoli florets
- 1 tablespoon olive oil
- ½ teaspoon salt
- ¼ teaspoon black pepper
For the Cheese Sauce
- 4 oz (113 g) cream cheese, softened
- ½ cup (120 g) plain Greek yogurt
- ½ cup (120 ml) heavy cream
- 1 cup (100 g) shredded cheddar cheese
- ¼ cup (25 g) grated Parmesan cheese
- 2 cloves garlic, minced
- ½ teaspoon onion powder
- ½ teaspoon dried Italian seasoning
- ¼ teaspoon paprika
- ¼ teaspoon black pepper
- ½ teaspoon salt, or to taste
For the Topping
- ½ cup (50 g) shredded cheddar cheese
- 2 tablespoons grated Parmesan cheese
- 1 tablespoon chopped fresh parsley, optional
Ingredient note: Use thick plain Greek yogurt for the creamiest sauce. Freshly shredded cheese generally melts more smoothly than pre-shredded varieties.
Directions
- Preheat the oven.
Heat the oven to 375°F (190°C). Lightly grease a 9 × 13-inch baking dish. - Prepare the vegetables.
Cut the cauliflower and broccoli into similar-sized florets so they cook evenly. - Par-cook the vegetables.
Bring a large pot of salted water to a boil. Add the cauliflower and broccoli and cook for 3–4 minutes. - Drain thoroughly.
Drain the vegetables immediately and allow them to steam-dry for several minutes. Excess moisture can make the finished casserole watery. - Season the vegetables.
Toss the drained vegetables with olive oil, salt, and black pepper. - Prepare the cheese sauce.
Place a saucepan over medium-low heat. Add cream cheese and heavy cream. - Whisk until smooth.
Cook for approximately 2–3 minutes, whisking continuously until the cream cheese melts into the cream. - Add the Greek yogurt.
Reduce the heat to low and whisk in the Greek yogurt. Avoid boiling the mixture, as high heat can cause the yogurt to separate. - Add seasonings and cheese.
Stir in minced garlic, onion powder, Italian seasoning, paprika, salt, and pepper. Add 1 cup shredded cheddar and ¼ cup Parmesan. - Melt the cheese.
Stir gently over low heat for 1–2 minutes, until the sauce becomes smooth and creamy. - Combine with the vegetables.
Place the cauliflower and broccoli in a large bowl. Pour the cheese sauce over them and gently fold until evenly coated. - Transfer to the baking dish.
Spread the mixture evenly in the prepared dish. - Add the topping.
Sprinkle the remaining cheddar and Parmesan evenly over the top. - Bake.
Bake uncovered at 375°F (190°C) for 20–25 minutes, until bubbling around the edges. - Brown the top.
If desired, switch to broil/high heat for 1–2 minutes, watching carefully until the cheese becomes golden brown. - Rest before serving.
Remove the casserole and let it rest for 5–10 minutes. The sauce will thicken slightly as it cools. - Garnish and serve.
Sprinkle with fresh parsley if desired and serve warm.
Highprotein cooking tip: Choose Greek yogurt with a higher protein content and freshly shredded cheese. For a complete highprotein meal, serve the casserole with grilled chicken, lean turkey, or fish.
Nutrition Facts
Per Serving — Approximate
- Calories: 255 kcal
- Fat: 20 g
- Cholesterol: 55 mg
- Sodium: 520 mg
- Potassium: 420 mg
- Total Carbohydrates: 11 g
- Fiber: 3 g
- Net Carbs: 8 g
- Sugars: 4 g
- Protein: 13 g
- Calcium: 285 mg
Nutrition information is an approximate estimate and can vary depending on the specific dairy products, cheese brands, and vegetable sizes used.
Notes
- For more protein: Use high-protein Greek yogurt and serve with grilled chicken or turkey.
- For fewer calories: Use reduced-fat cream cheese and Greek yogurt.
- For extra flavor: Add a pinch of red pepper flakes or smoked paprika.
- For a crunchy topping: Add crushed pork rinds or keto-friendly breadcrumbs before baking.
- For more vegetables: Add sliced mushrooms, zucchini, or spinach.
- Storage: Refrigerate leftovers in an airtight container for 3–4 days.
- Freezing: Freeze portions for up to 2 months, although the sauce may become slightly less smooth after thawing.
- Reheating: Reheat gently in the microwave or in a 350°F oven until hot.
- Allergy notes: Contains dairy. If using packaged seasonings or toppings, check labels for additional allergens.
- Flavor boost: Fresh garlic, Parmesan, parsley, or a small amount of Dijon mustard can add extra depth.
- Texture tip: Drain the vegetables extremely well before adding the cheese sauce.
- Keto tip: Check packaged dairy products for added starches or sugars if strict carbohydrate tracking is important.
- Meal-prep tip: Divide leftovers into individual containers for convenient low-carb lunches.
- Serving suggestion: Pair with grilled chicken, roasted turkey, steak, or baked salmon.
Frequently Asked Questions
Can I use frozen cauliflower and broccoli?
Yes, frozen vegetables can be used, but thaw and drain them very thoroughly before combining them with the cheese sauce.
Can I make this casserole ahead of time?
Yes, assemble it several hours ahead, refrigerate it covered, and bake until hot and bubbling when ready to serve.
How can I make this casserole higher in protein?
Use high-protein Greek yogurt and serve the casserole alongside grilled chicken, turkey, fish, or another lean protein.
Can I use a different cheese?
Yes, Monterey Jack, mozzarella, Gruyère, or a cheddar blend can work well in place of some or all of the cheddar.
Why is my casserole watery?
The most common cause is excess moisture in the cauliflower and broccoli, so drain and steam-dry the vegetables thoroughly.
Is this casserole keto-friendly?
Yes, it is designed as a low-carb casserole with approximately 8 g net carbs per serving, although the exact amount depends on the ingredients and brands used.
