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broccoli and cheese casserole in a blue baking dish with a wooden spoon

Keto Broccoli Cheese Casserole

This Keto Broccoli Cheese Casserole is super rich and filling. It's a perfect keto casserole to bring to pot lucks to for family dinners. 

Course Casserole
Cuisine American
Keyword Broccoli and cheese casserole, keto broccoli cheese casserole, keto Casserole
Prep Time 22 minutes
Cook Time 15 minutes
Total Time 37 minutes
Servings 8
Calories 337 kcal
Author Lara


  • 4 cups broccoli florets
  • 2 tablespoons unsalted butter
  • ½ cup red onion diced
  • 2 cloves garlic minced
  • 6 ounces cream cheese cubed, at room temperature
  • 2/3 cup heavy cream
  • 1 teaspoon dijon mustard
  • 1 teaspoon salt
  • ½ teaspoon ground black pepper
  • 6 ounces shredded cheddar divided
  • 6 ounces mozzarella cheese


  1. Preheat oven to 400 degrees F. Butter an 8x8 casserole dish and set aside.
  2. Bring a large pot of water to a rolling boil; add the broccoli and blanch for 1 minute, then drain well and place in a large mixing bowl.
  3. Melt butter in a deep skillet over medium heat. Saute onion 3-4 minutes, then add the garlic.
  4. Stir in the cream cheese until melted, and then stir in the heavy cream, mustard, salt, pepper, half of the cheddar, and the mozzarella. Once the cheese is melted, pour over broccoli and stir to coat.
  5. Pour the contents into the prepared dish and top with the remaining cheddar. Bake uncovered 15-20 minutes, until cheese is bubbling and golden.

Recipe Notes

  • Leftover are good up until 5 days.
  • This is perfect to bring for pot lucks and family gatherings.
  • 6 grams total carbs, 1g fiber and 5g net carbs per serving
Nutrition Facts
Keto Broccoli Cheese Casserole
Amount Per Serving
Calories 337 Calories from Fat 261
% Daily Value*
Fat 29g45%
Saturated Fat 18g113%
Cholesterol 97mg32%
Sodium 655mg28%
Potassium 240mg7%
Carbohydrates 6g2%
Fiber 1g4%
Sugar 2g2%
Protein 13g26%
Vitamin A 1305IU26%
Vitamin C 42mg51%
Calcium 319mg32%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.