Healthy Broccoli Cauliflower Casserole

By Adam Fisher
Published 11/5/2026
Dietitian Reviewed: Erin McNamara, RDN, LDN, CLT
Approved for These Diets:
Healthy Broccoli Cauliflower Casserole

Many broccoli casseroles start by opening a can of condensed soup, and that’s where the sodium piles up. This Healthy Broccoli Cauliflower Casserole skips the can entirely. Tender broccoli and cauliflower bake in a creamy, cheesy cottage cheese sauce, and each ¾ cup serving has just 71 calories, 91 mg of sodium, and 8 grams of protein.

The trick is a blender. No-salt-added cottage cheese, an egg, and a couple of egg whites whirl into a silky sauce that sets up like a light custard in the oven, with dry mustard, garlic, and a pinch of nutmeg giving it that classic cheese-sauce flavor. A little sharp cheddar goes into the sauce, the rest melts on top with Parmesan and smoked paprika, and you end up with an easy, golden cauliflower and broccoli casserole that’s as welcome on a weeknight as it is on the Thanksgiving table.

For more lighter takes on the classics, browse our collection of heart healthy side dish recipes.

Total Time
45 minutes
Servings
12
Calories
71

What Makes This Broccoli Cauliflower Casserole Healthy

Canned cream soups, full-fat cheese, and buttery cracker toppings are what turn a pan of vegetables into a salty, heavy side. This recipe replaces all three. Blended low-fat cottage cheese and eggs make the creamy sauce, a modest 1/2 cup of reduced-fat cheddar and a tablespoon of Parmesan provide the cheesy flavor, and there’s no added salt anywhere in the dish. Cooking from scratch with whole ingredients is one of the simplest ways to follow a low sodium diet, and this casserole is a tasty example.

Key Health Highlights

  • Low Sodium: Has 91mg of sodium per serving, which is less than 4% of the 2,300mg daily limit recommended by the Dietary Guidelines for Americans.
  • Protein-Packed Side: Cottage cheese, an egg, and egg whites give each serving 8g of protein, a lot for a side dish with only 71 calories.
  • Low Carb: With 6g of carbohydrates, 2g of fiber, and 0g of added sugars per serving, it fits easily into diabetic and low carb meal plans.
  • Low in Saturated Fat: Low-fat cottage cheese, skim milk, reduced-fat cheddar, and just one egg yolk keep saturated fat at 1g and cholesterol at 23mg.
  • Calcium Boost: The dairy in the sauce and topping adds 108mg of calcium per serving.
  • Gluten Free and Vegetarian: With no flour, breadcrumbs, or canned soup, the casserole is naturally gluten free, and it’s meatless, too.

FAQs About Broccoli Cauliflower Casserole

Steam the broccoli and cauliflower until crisp-tender and dry them well. Blend cottage cheese with eggs, milk, and seasonings until smooth, stir in some shredded cheddar, and pour the sauce over the vegetables. Top with more cheese and bake at 375°F until the center is set and golden.

This version can be a smart choice. A 3/4 cup serving has 71 calories, 8g of protein, and 2g of fiber, so it’s filling for very few calories. Classic recipes made with canned soup, extra cheese, and a buttery topping are much richer. For more ideas, try our low calorie casserole recipes for weight loss.

With 6g of total carbohydrates and 2g of fiber per serving, it works well as a keto broccoli casserole and fits most low carb eating plans. It doesn’t use flour, breadcrumbs, or crackers, which is where most broccoli casseroles get their carbs, so this low carb broccoli casserole keeps the comfort without them. You can learn more about building a lower carb plate in our low carb diet guidelines.

Blend cottage cheese with eggs and a splash of milk. The mixture is creamy and thick enough to coat the vegetables, and it bakes into a tender custard that holds the casserole together. Swapping canned soup for a homemade sauce is one of the easiest ways to cut back on salt at holiday meals.

Frozen vegetables work well, and you can use frozen cauliflower, too. Use 2 pounds of frozen broccoli and cauliflower florets, thaw them, skip the steaming step, and pat them very dry with a towel before adding the sauce. Frozen vegetables release more water, so drying them well keeps the casserole from turning soggy.

Steaming and roasting are two of the best methods because they use little or no added fat and help the vegetables keep more of their vitamins than boiling does. Try our garlic roasted broccoli, air fryer garlic broccoli, roasted cauliflower and Brussels sprouts, or creamy mashed cauliflower.

This broccoli cauliflower casserole recipe can be assembled up to 1 day ahead. Cover it and refrigerate it unbaked, then add 5 to 10 minutes to the baking time. We don’t recommend freezing it, since the cottage cheese and egg sauce can turn watery and grainy after thawing.

More Healthy Vegetable Casseroles

If a creamy, comforting casserole is your favorite part of the holiday table, these recipes take the same lighter approach. Each one has less than 200mg of sodium per serving.

More Broccoli and Cauliflower Side Dishes

Broccoli and cauliflower are two of the most versatile vegetables in the kitchen. If you’re looking for more healthy broccoli and cauliflower recipes, these sides show them off in very different ways, from cheesy and warm to crisp and crunchy.

Homemade vs. Canned Soup: Why Our Recipe Is Healthier

Classic broccoli casseroles are built on a can of condensed cream soup, which adds most of the sodium before any cheese or topping goes on. Here is how a ¾ cup serving of our casserole compares with the condensed cream of mushroom soup most recipes call for:

  • Sodium: A full serving of our casserole has 91mg of sodium. Just 1/2 cup of the condensed soup has 410mg, more than 4 times as much, and that’s before the cheese and crackers in a typical recipe.
  • Calories: Our casserole has 71 calories per serving, vegetables, cheese, and all. That’s about the same as 1/2 cup of the condensed soup on its own.
  • Protein: The cottage cheese and egg sauce gives each serving 8g of protein, so the creamy part of our casserole adds nutrition instead of just salt and starch.
  • Simple Ingredients: Our sauce is made from cottage cheese, eggs, and milk, seasoned with spices you probably already have in your kitchen.

Ingredient Spotlights

  • No-Salt-Added Cottage Cheese: This is the key to the whole recipe. Regular cottage cheese can have several hundred milligrams of sodium per 1/2 cup, while no-salt-added versions have very little. Blending it makes the sauce completely smooth and turns this into a true broccoli cauliflower cottage cheese bake.
  • Broccoli and Cauliflower: Steaming them just until crisp-tender and drying them on a towel keeps the florets from going mushy and the casserole from turning watery.
  • Egg and Egg Whites: One whole egg adds richness, and the two egg whites help the sauce set with less cholesterol.
  • Reduced-Fat Sharp Cheddar and Parmesan: Sharp cheddar has more flavor per ounce, so a little goes a long way, and a tablespoon of Parmesan adds a savory, golden finish on top.
  • Dry Mustard and Nutmeg: These two quiet seasonings are what make the sauce taste like a classic cheese sauce. Dry mustard adds tang without the sodium of prepared mustard.

Healthy Variations

  • Broccoli, Cauliflower, and Carrot Casserole: Swap 1 cup of the cauliflower for 1 cup of sliced carrots, steamed along with the other vegetables, for extra color on a holiday table.
  • Crunchy Topping: Toss 1/3 cup of whole wheat panko with 1 teaspoon of olive oil and sprinkle it over the cheese before baking. The casserole won’t be gluten free or as low in carbs with this addition.
  • Spinach and Mushroom: Fold in 1 cup of sautéed mushrooms and a handful of chopped baby spinach with the steamed vegetables.
  • Spicy Kick: Add 1/4 teaspoon of crushed red pepper flakes to the sauce, or swap the reduced-fat cheddar for an equal amou
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Ingredients

Recipe yields 12 servings

Directions

  1. Step 1

    Preheat the oven to 375°F. Coat a 2½-quart (or 11x7-inch) baking dish with nonstick cooking spray.

  2. Step 2

    Steam the broccoli and cauliflower for 4 to 5 minutes, until crisp-tender. Drain well and spread on a clean kitchen towel to dry. Removing the extra moisture keeps the casserole from turning watery.

  3. Step 3

    In a blender or food processor, blend the cottage cheese, egg, egg whites, milk, dry mustard, garlic powder, onion powder, pepper, and nutmeg until completely smooth. Stir in ¼ cup of the cheddar.

  4. Step 4

    Spread the vegetables in the baking dish. Pour the sauce over them and stir gently to coat.

  5. Step 5

    Sprinkle the remaining ¼ cup of cheddar, the Parmesan, and the smoked paprika over the top.

  6. Step 6

    Bake for 25 to 30 minutes, until the center is set and the top is golden. Let stand for 5 minutes before serving.

Nutrition Facts

Serving Size:
3/4 cup

71
Calories
2
g
Fat
23
mg
Cholesterol
91
mg
Sodium
6
g
Carbs
1
g
Sat. Fat
2
g
Fiber
8
g
Protein
3
g
Sugars
263
mg
Potassium
52
mg
Phosphorus

Alternative Cooking Methods

  • Microwave-Steamed Vegetables: Place the broccoli and cauliflower in a large microwave-safe bowl with 2 tablespoons of water, cover, and microwave on high for 4 to 5 minutes, until crisp-tender. Drain and dry them on a towel as directed.
  • Make-Ahead Casserole: Assemble the casserole up to 1 day ahead, cover, and refrigerate it unbaked. Let it stand at room temperature while the oven heats, and add 5 to 10 minutes to the baking time.
  • Smaller Batch: Halve the recipe and bake it in an 8-inch square baking dish. Start checking for doneness at 20 minutes.

Serving & Storage Tips

  • Storage: Store leftovers in an airtight container in the refrigerator for 3 to 4 days.
  • Freezing: We don’t recommend freezing this casserole. The cottage cheese and egg sauce can separate and turn grainy after thawing.
  • Reheating: Warm individual servings in the microwave, or reheat the casserole covered with foil in a 350°F oven for 15 to 20 minutes, until hot in the center.

What to Serve with This Healthy Broccoli Cauliflower Casserole

This cheesy broccoli and cauliflower bake pairs well with just about any lean main dish. Serve it alongside low sodium roasted chicken with oranges and herbs, a slice of turkey meatloaf, or herb roasted turkey for a holiday dinner. Planning a bigger spread? Our healthy Thanksgiving side dishes will help you fill out the rest of the table.

Ingredient Substitutions

Regular low-fat cottage cheese works, but it will raise the sodium noticeably. Part-skim ricotta is another option, though the sauce will be a little less smooth and higher in calories and saturated fat.

Use 4 egg whites in place of the whole egg and egg whites, or 1/2 cup of liquid egg substitute.

Reduced-fat Swiss or part-skim mozzarella melts just as well. Keep the total to 1/2 cup to hold the sodium where it is.

Use all broccoli or all cauliflower, as long as the total is about 8 cups of florets. Frozen florets also work when thawed and patted dry.

Unsweetened plain almond or soy milk works in place of skim milk.

More Healthy Thanksgiving Side Dishes

Building a lighter holiday menu? These favorites sit right beside this casserole on the Thanksgiving table, and you’ll find plenty more in our collection of healthy Thanksgiving side recipes.