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baking dish with low carb zucchini au gratin on blue tea towel

Low Carb Zucchini Au Gratin Casserole

This low carb zucchini au gratin casserole is a delicious side dish to make this summer. Take one of those huge zucchinis from your garden and quickly make this cheesy keto casserole with only 5.1g net carbs.

Course Side Dish
Cuisine American
Keyword breakfast casserole, zucchini
Prep Time 10 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings 4
Calories 429 kcal
Author Denise


  • 4 cups zucchini, chopped
  • 1 tablespoon dried minced onion
  • 1/2 teaspoon salt
  • 1/4 teaspoon pepper
  • 1 1/2 cups gruyere or Swiss cheese, shredded
  • 3/4 cup cream, heavy
  • 1/2 cup ground pork rinds
  • 1/4 cup Parmesan cheese, grated


  1. Preheat oven to 375°F.

  2. Add chopped zucchini to the microwave and cook for 3 minutes. Take out the zucchini and place in a tea towel and gently squeeze out the excess water.

  3. Place in a sprayed baking dish and mix with onion, salt and pepper seasonings.

  4. Sprinkle gruyere cheese even over top and then pour the cream all over.

  5. Mix the Parmesan cheese and ground pork rinds and then sprinkle over the top.

  6. Bake for 45 minutes until brown and bubbly.

Recipe Notes

The nutritional information for 1 serving: 

429 cals / 35.3g fat / 6.5g carbs / 1.4g fiber / 23.3g protein = 5.1g net carbs