Ingredients for Keto Zucchini Casserole

Here are the carefully measured ingredients you will need to create this delicious casserole:

  • 4 medium zucchinis (about 6 cups sliced, thinly cut into rounds)
  • 2 tablespoons olive oil
  • 1 small onion, finely chopped
  • 3 cloves garlic, minced
  • 1 cup heavy whipping cream
  • 2 large eggs, beaten
  • 1 teaspoon salt
  • ½ teaspoon black pepper
  • 1 teaspoon Italian seasoning (or dried oregano + basil mix)
  • 1 cup shredded mozzarella cheese
  • ½ cup shredded cheddar cheese
  • ¼ cup grated Parmesan cheese
  • 2 tablespoons almond flour (to thicken the mixture slightly)
  • Fresh parsley for garnish

Instructions for Preparing the Casserole

  1. Prepare the zucchini: Wash the zucchinis thoroughly, then slice them into thin, even rounds. You can use a mandoline slicer for perfectly uniform slices. Place the slices on paper towels, sprinkle lightly with salt, and let them sit for 10–15 minutes to draw out excess water. Pat dry before layering.
  2. Cook the aromatics: In a medium skillet, heat olive oil over medium heat. Add chopped onion and sauté until translucent, about 5 minutes. Stir in minced garlic and cook for another minute until fragrant. Remove from heat and set aside.
  3. Make the creamy base: In a mixing bowl, whisk together the heavy cream, beaten eggs, salt, pepper, Italian seasoning, and almond flour. This mixture will help bind the casserole and create a creamy, custard-like texture.
  4. Layer the casserole: Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish with a little olive oil. Arrange half of the zucchini slices in an even layer at the bottom of the dish. Sprinkle with half of the sautéed onions and garlic, then pour half of the cream mixture over the top. Add half of the mozzarella and cheddar cheese.
  5. Repeat the process: Add the remaining zucchini slices in another even layer, followed by the rest of the onions, cream mixture, and cheeses. Top with Parmesan cheese for a golden crust.
  6. Bake: Place the casserole in the preheated oven and bake uncovered for 30–35 minutes, or until the top is bubbly, golden brown, and set in the center.
  7. Rest and serve: Remove the casserole from the oven and allow it to rest for 10 minutes before slicing. Garnish with fresh parsley and serve warm.

Nutrition Facts (Per Serving – based on 6 servings)

  • Calories: 280
  • Total Fat: 22g
  • Saturated Fat: 12g
  • Carbohydrates: 7g
  • Fiber: 2g
  • Net Carbs: 5g
  • Protein: 12g

Weight Watchers SmartPoints (per serving)

  • Green Plan: 6 SmartPoints
  • Blue Plan: 5 SmartPoints
  • Purple Plan: 5 SmartPoints

This casserole is surprisingly low in points, especially considering how creamy and filling it is. By using zucchini as the base, you avoid starchy carbs while still enjoying the comfort of a cheesy baked dish.

Why This Recipe Works

One of the biggest challenges in low-carb cooking is finding substitutes for pasta and potatoes. Zucchini is the perfect alternative because it provides bulk and texture without overwhelming calories or carbs. The creamy egg-and-cream mixture holds everything together while the cheese creates a satisfying richness that feels indulgent. Almond flour adds a subtle nutty flavor while also preventing the casserole from becoming watery.

This recipe is also highly customizable. You can add cooked ground chicken, turkey, or beef for extra protein. For more flavor, incorporate herbs like thyme or rosemary. If you want to make it lighter, substitute half-and-half for heavy cream or reduce the cheese slightly.

Make-Ahead and Storage Tips

  • Make Ahead: Assemble the casserole in the baking dish, cover tightly with foil, and refrigerate for up to 24 hours before baking. This makes it an excellent option for busy weeknights or holiday gatherings.
  • Storage: Leftovers can be stored in an airtight container in the refrigerator for up to 4 days.
  • Freezing: Wrap portions in freezer-safe containers and freeze for up to 2 months. Thaw overnight in the refrigerator before reheating.

Serving Suggestions

This Keto Zucchini Casserole pairs beautifully with a variety of dishes:

  • Serve alongside grilled chicken breasts or baked salmon for a balanced meal.
  • Pair with a crisp green salad for a light yet satisfying lunch.
  • Use as a side dish for roasted meats at family dinners or festive gatherings.

Health Benefits of Zucchini

Zucchini is not only low in calories but also rich in important nutrients. It is packed with vitamin C, potassium, and antioxidants that support heart health and immunity. Its high water content aids in hydration while its fiber supports digestion. When used in this casserole, zucchini becomes the star of the dish, allowing you to enjoy comfort food that’s also nourishing.

Final Thoughts

This Keto Zucchini Casserole is more than just a low-carb alternative – it’s a dish that everyone at the table will enjoy. With its cheesy layers, creamy base, and tender zucchini, it delivers on flavor, nutrition, and comfort. Best of all, it fits beautifully into both ketogenic and Weight Watchers meal plans, making it versatile and practical.

Whether you are new to keto or a seasoned follower, this recipe deserves a spot in your rotation. It’s wholesome, satisfying, and easy to prepare, proving that healthy eating doesn’t mean sacrificing flavor.