This Keto Zucchini Casserole is a delightful dish that brings together cheesy goodness and buttery flavor while being low in carbs. Perfect for any occasion, this casserole showcases the versatility of zucchini, making it an ideal side dish or a satisfying main course. With its creamy texture and crispy topping, you’ll find yourself reaching for seconds!
Why You’ll Love This Recipe
- Deliciously Cheesy: The blend of mozzarella, cheddar, and Parmesan cheeses creates a rich and flavorful dish that everyone will enjoy.
- Easy to Prepare: With simple steps and minimal prep time, this casserole is perfect for busy weeknights or gatherings.
- Low Carb Delight: Enjoy a guilt-free treat with low carbohydrates, making it suitable for keto diets.
- Versatile Dish: Serve it as a side with your favorite protein or enjoy it as a meatless meal on its own.
- Kid-Friendly: The cheesy and comforting flavors make this an appealing option for even the pickiest eaters.
Tools and Preparation
To create your Keto Zucchini Casserole, you’ll need some essential tools to ensure everything goes smoothly.
Essential Tools and Equipment
- Non-stick cooking spray
- Cheesecloth or cotton kitchen towel
- Mixing bowl
- Baking dish (8” x 8”)
- Small bowl for mixing toppings
- Oven
Importance of Each Tool
- Non-stick cooking spray: This helps prevent the casserole from sticking to the baking dish, ensuring easy serving.
- Cheesecloth or cotton kitchen towel: Essential for squeezing out excess moisture from the zucchini, preventing a watery casserole.
- Mixing bowl: A larger bowl allows you to combine all ingredients easily without making a mess.

Ingredients
This Keto Zucchini Casserole is cheesy, buttery, and packed with low carb zucchini!
For the Casserole
- 4 cups shredded zucchini (about 4 medium zucchini)
- 1/4 tsp salt
- 1/2 cup diced yellow onion
- 2 tbsp minced garlic
- 2 eggs (beaten)
- 1 cup shredded mozzarella cheese
- 1/2 cup shredded cheddar cheese
- 3/4 cup grated Parmesan cheese (divided)
For the Topping
- 1/2 cup crushed beef rinds or Parmesan cheese crisps
- 3 tbsp butter
How to Make Keto Zucchini Casserole
Step 1: Preheat the Oven
Preheat your oven to 375 F. Prepare an 8” x 8” baking dish by spraying it with non-stick cooking spray.
Step 2: Drain the Zucchini
Place half of the shredded zucchini in the center of a clean cheesecloth or cotton kitchen towel. Twist the cloth to form a pouch. Over the sink, squeeze to extract as much water as possible from the zucchini.
Step 3: Repeat Draining Process
Add the drained zucchini to a bowl. Repeat this process with the remaining shredded zucchini.
Step 4: Combine Ingredients
In a large bowl, add the drained zucchini along with diced onion, minced garlic, beaten eggs, mozzarella cheese, cheddar cheese, and 1/2 cup of Parmesan cheese. Mix well until combined.
Step 5: Bake Initially
Transfer the mixture into your prepared baking dish and bake for about 20 minutes.
Step 6: Prepare Topping While Baking
While your casserole bakes, melt butter in a small saucepan. In another bowl, combine crushed beef rinds (or Parmesan crisps), remaining 1/4 cup of Parmesan cheese, and melted butter. Stir well to mix.
Step 7: Add Topping and Finish Baking
After baking for 20 minutes, remove your casserole from the oven. Evenly sprinkle the buttered mixture over the top. Return it to the oven for an additional 5-8 minutes or until golden brown and crispy on top.
Step 8: Serve and Enjoy!
Remove from oven and let cool slightly before serving. Season with salt and pepper to taste. Enjoy your delicious Keto Zucchini Casserole!
How to Serve Keto Zucchini Casserole
This Keto Zucchini Casserole is not only delicious but also versatile. You can serve it in various ways to enhance your meal experience.
As a Standalone Dish
- Perfectly satisfying on its own, this casserole can be the main attraction for a light lunch or dinner.
With Grilled Chicken
- Pairing with grilled chicken adds protein and complements the cheesy flavors of the casserole.
As a Side Dish
- Serve alongside a protein like turkey or beef for a balanced meal that keeps carbs low.
Topped with Fresh Herbs
- Garnish with fresh herbs such as parsley or basil for an added burst of flavor and color.
With a Side Salad
- A simple green salad with vinaigrette can add freshness and crunch to your meal.
How to Perfect Keto Zucchini Casserole
To ensure your Keto Zucchini Casserole turns out perfectly every time, follow these helpful tips.
- Dry the zucchini well: Removing excess moisture prevents the casserole from becoming soggy.
- Use freshly shredded cheese: Fresh cheese melts better and enhances the texture compared to pre-shredded options.
- Adjust seasonings: Feel free to customize the spices and herbs according to your taste preferences.
- Let it cool before slicing: Allowing it to rest for a few minutes after baking makes slicing easier and helps it hold its shape.
- Experiment with toppings: Try adding different toppings like crushed nuts or seeds for extra crunch and nutrition.
Best Side Dishes for Keto Zucchini Casserole
Enhance your meal by pairing this Keto Zucchini Casserole with these delightful side dishes.
- Cauliflower Rice: A low-carb alternative that absorbs flavors well, making it a great complement.
- Steamed Broccoli: Nutritious and easy to prepare, steamed broccoli adds color and fiber.
- Roasted Brussels Sprouts: These crispy veggies offer a nutty flavor that pairs beautifully with cheesy casseroles.
- Garlic Mashed Cauliflower: Creamy and satisfying, this dish mimics traditional mashed potatoes without the carbs.
- Cucumber Salad: Refreshing and crunchy, a cucumber salad provides a light contrast to the rich casserole.
- Grilled Asparagus: Tender asparagus spears bring an earthy flavor that balances out the richness of the casserole.
Common Mistakes to Avoid
When making Keto Zucchini Casserole, it’s easy to make a few common mistakes. Here are some pitfalls to watch out for.
- Boldly skip draining the zucchini: Failing to remove excess moisture can lead to a watery casserole. Always drain your shredded zucchini thoroughly for the best texture.
- Boldly neglect preheating the oven: Starting with a cold oven can affect cooking times and result in uneven baking. Be sure to preheat your oven before placing the casserole inside.
- Boldly use low-quality cheese: Using cheese with less flavor can dull your dish. Opt for high-quality mozzarella, cheddar, and Parmesan for richer taste.
- Boldly ignore seasoning: Forgetting to season can make your casserole bland. Make sure to add salt and pepper to enhance flavor throughout the dish.
- Boldly overbake the topping: Baking too long may burn the topping instead of achieving a golden crisp. Keep an eye on it during the last few minutes of baking.

Storage & Reheating Instructions
Refrigerator Storage
- Store leftover Keto Zucchini Casserole in an airtight container.
- It can be kept in the fridge for up to 3 days.
Freezing Keto Zucchini Casserole
- Freeze portions in airtight containers or freezer bags.
- The casserole stays fresh in the freezer for up to 2 months.
Reheating Keto Zucchini Casserole
- Oven: Preheat to 350°F (175°C) and bake for about 15-20 minutes until warmed through.
- Microwave: Place a portion on a microwave-safe plate and heat in 30-second intervals until hot.
- Stovetop: Heat on low in a skillet, stirring occasionally until heated through.
Frequently Asked Questions
Here are some common queries about Keto Zucchini Casserole:
Can I substitute other vegetables in the Keto Zucchini Casserole?
Yes! You can add spinach, mushrooms, or bell peppers for extra nutrition and flavor.
How do I make my Keto Zucchini Casserole spicier?
Add red pepper flakes or diced jalapeños into your mixture before baking for a spicy kick.
Is this recipe suitable for meal prep?
Absolutely! Keto Zucchini Casserole is great for meal prep and can be stored easily in portions.
What type of cheese works best in Keto Zucchini Casserole?
Using high-quality mozzarella, cheddar, and Parmesan offers the best flavors and textures.
Final Thoughts
This Keto Zucchini Casserole is not only delicious but also versatile enough for various occasions. Feel free to customize it with your favorite veggies or spices to suit your taste. It’s an excellent choice for a healthy side dish or even a light main course that everyone will love!
Keto Zucchini Casserole
Keto Zucchini Casserole is a scrumptious, low-carb delight that combines the rich flavors of cheese and buttery goodness with the fresh taste of zucchini. This versatile dish can be enjoyed as a standalone meal or paired with your favorite proteins for a satisfying dinner. With its creamy interior and crispy topping, it’s sure to please both keto enthusiasts and casual diners alike. Easy to prepare, this casserole is perfect for busy weeknights or gatherings, making it a staple in your healthy recipe repertoire.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: Serves approximately 6 people 1x
- Category: Main
- Method: Baking
- Cuisine: Keto
Ingredients
- 4 cups shredded zucchini
- 1/2 cup diced yellow onion
- 2 tbsp minced garlic
- 2 beaten eggs
- 1 cup shredded mozzarella cheese
- 1/2 cup shredded cheddar cheese
- 3/4 cup grated Parmesan cheese (divided)
- 1/2 cup crushed beef rinds or Parmesan cheese crisps
- 3 tbsp butter
Instructions
- Preheat your oven to 375°F (190°C) and spray an 8” x 8” baking dish with non-stick cooking spray.
- Drain shredded zucchini by squeezing out excess moisture using cheesecloth or a cotton kitchen towel.
- In a large bowl, combine drained zucchini, diced onion, garlic, beaten eggs, mozzarella, cheddar cheese, and half the Parmesan. Mix well.
- Pour the mixture into the prepared baking dish and bake for about 20 minutes.
- While baking, melt butter in a saucepan and mix with crushed beef rinds (or Parmesan crisps) and remaining Parmesan in a separate bowl.
- After 20 minutes, sprinkle the topping over the casserole and return it to the oven for an additional 5-8 minutes until golden brown.
- Let cool slightly before serving. Enjoy!
Nutrition
- Serving Size: 1 serving
- Calories: 220
- Sugar: 3g
- Sodium: 360mg
- Fat: 15g
- Saturated Fat: 9g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 7g
- Fiber: 2g
- Protein: 10g
- Cholesterol: 90mg
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