Keto Zucchini Casserole
This Keto Zucchini Casserole is a delicious blend of cheesy goodness and healthy zucchini that fits perfectly into your low-carb lifestyle. Packed with flavor, it’s an excellent choice for family dinners, potlucks, or meal prep. You’ll love how easy it is to whip up this dish, making it a standout option for any occasion. Enjoy the buttery texture and savory taste while keeping your carb count low!
Why You’ll Love This Recipe
- Easy to Prepare: This casserole comes together in just 10 minutes of prep time, making it ideal for busy weeknights.
- Flavorful and Cheesy: With three types of cheese, this dish is rich, creamy, and incredibly satisfying.
- Low Carb Delight: Perfect for keto dieters, this casserole keeps your carbohydrate intake in check without sacrificing taste.
- Versatile Side Dish: Pair it with meats or serve it as a vegetarian main course; it’s a great addition to any meal.
- Healthy Ingredients: Made with fresh zucchini and nutritious ingredients, you can feel good about what you’re eating.

Tools and Preparation
To make the best Keto Zucchini Casserole, you’ll need some essential kitchen tools. These will help ensure everything runs smoothly as you create this delightful dish.
Essential Tools and Equipment
- Non-stick cooking spray
- Cheesecloth or cotton kitchen towel
- Mixing bowl
- Baking dish (8” x 8”)
- Oven
Importance of Each Tool
- Non-stick cooking spray: This ensures your casserole doesn’t stick to the baking dish, making serving easier.
- Cheesecloth or cotton kitchen towel: Essential for squeezing out excess moisture from the zucchini, which prevents a soggy casserole.
- Mixing bowl: A sturdy bowl is crucial for combining all your ingredients thoroughly.
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)
- 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. While it’s heating up, prepare an 8” x 8” baking dish by spraying it generously with non-stick cooking spray.
Step 2: Squeeze the Zucchini
Place half of the shredded zucchini in a clean cheesecloth or cotton kitchen towel. Twist the cloth to form a pouch, then squeeze over the sink to remove as much water as possible. Add this drained zucchini to a mixing bowl. Repeat with the remaining zucchini.
Step 3: Combine Ingredients
In the mixing bowl containing the drained zucchini, add diced onion, minced garlic, beaten eggs, mozzarella cheese, cheddar cheese, and half of the grated Parmesan cheese. Mix everything well until combined.
Step 4: Bake the Casserole
Transfer the mixture into your prepared baking dish. Bake in the preheated oven for about 20 minutes.
Step 5: Prepare Topping While Baking
While your casserole bakes, melt butter in a small saucepan. In a separate bowl, combine crushed beef rinds (or Parmesan crisps), remaining Parmesan cheese, and melted butter. Stir until well mixed.
Step 6: Add Topping
After baking for 20 minutes, remove the dish from the oven. Sprinkle your buttered mixture evenly on top of the casserole. Return it to bake for an additional 5-8 minutes or until the topping is golden brown and crispy.
Step 7: Serve
Once done baking, take out your casserole and let it cool slightly before serving. Season with salt and pepper to taste!
How to Serve Keto Zucchini Casserole
This Keto Zucchini Casserole is versatile and can be served in various ways. Whether you want it as a side dish or a main course, here are some delicious serving suggestions to elevate your meal.
As a Main Dish
- Enjoy the casserole on its own for a satisfying low-carb meal.
With a Fresh Salad
- Pair with a light green salad for a refreshing contrast. A simple vinaigrette works great!
Topped with Avocado
- Add slices of ripe avocado on top for creaminess and healthy fats.
With Sour Cream or Greek Yogurt
- Serve with a dollop of sour cream or Greek yogurt for extra richness and flavor.
Accompanied by Grilled Chicken
- Pair it with grilled chicken breast for a protein-packed meal that’s still keto-friendly.
How to Perfect Keto Zucchini Casserole
Achieving the perfect Keto Zucchini Casserole involves attention to detail and some helpful tips. Here’s how to ensure your dish turns out delicious every time.
-
Drain Zucchini Well: Make sure to squeeze out as much moisture as possible from the zucchini. This prevents the casserole from being watery.
-
Use Fresh Ingredients: Opt for fresh zucchini and quality cheeses. Freshness significantly enhances flavor.
-
Experiment with Cheeses: While mozzarella and cheddar are great, try adding gouda or pepper jack for different flavor profiles.
-
Adjust Seasoning: Taste the mixture before baking and adjust salt and pepper as needed for your palate.
-
Bake Until Golden: Keep an eye on the topping while baking; it should be golden brown and crispy for the best texture.
Best Side Dishes for Keto Zucchini Casserole
Complement your Keto Zucchini Casserole with these perfect side dishes that align well with keto principles while enhancing your meal experience.
-
Garlic Butter Green Beans
Sautéed green beans in garlic butter add crunch and flavor without many carbs. -
Cauliflower Rice
A fluffy alternative to traditional rice, cauliflower rice is low in carbs and can soak up flavors beautifully. -
Roasted Brussels Sprouts
These roasted veggies bring a nutty taste that pairs well with cheesy casseroles. -
Creamy Spinach Salad
A spinach salad topped with creamy dressing provides freshness alongside the richness of the casserole. -
Stuffed Bell Peppers
These colorful peppers can be filled with ground meat and seasonings, making them a hearty addition to any meal. -
Zoodle Salad
Spiralized zucchini salad tossed in olive oil and lemon juice adds brightness and complements the casserole perfectly.
Common Mistakes to Avoid
Avoiding mistakes can make your Keto Zucchini Casserole turn out perfectly. Here are some common pitfalls to watch for:
- Overlooking Water Content: Failing to remove excess moisture from the zucchini can lead to a soggy casserole. Always squeeze out as much water as possible before mixing.
- Skipping Cheese Varieties: Using just one type of cheese might not give you the best flavor. Mix mozzarella, cheddar, and Parmesan for a richer taste.
- Not Preheating the Oven: Baking in an unpreheated oven can affect the cooking time and texture. Always preheat to 375°F before starting.
- Using Low-Quality Ingredients: Poor-quality cheeses or stale ingredients can ruin your dish. Invest in fresh, quality products for the best results.
- Ignoring Seasoning: Not seasoning adequately can result in bland flavors. Taste the mixture before baking and adjust salt and pepper as needed.

Storage & Reheating Instructions
Refrigerator Storage
- Store leftover Keto Zucchini Casserole in an airtight container.
- It will keep well in the fridge for up to 3-4 days.
Freezing Keto Zucchini Casserole
- For long-term storage, freeze individual portions in freezer-safe containers.
- It can last up to 2-3 months in the freezer.
Reheating Keto Zucchini Casserole
- Oven: Preheat your oven to 350°F and bake for about 15-20 minutes until heated through.
- Microwave: Heat individual portions on medium power for 1-2 minutes, checking frequently.
- Stovetop: Warm on medium heat in a skillet, stirring occasionally until hot.
Frequently Asked Questions
Here are some frequently asked questions about Keto Zucchini Casserole:
Can I make Keto Zucchini Casserole ahead of time?
Yes, you can prepare it a day ahead and store it in the fridge until you’re ready to bake.
What variations can I try with this Keto Zucchini Casserole?
Feel free to add cooked ground meat or spices like Italian seasoning for extra flavor.
Is this Keto Zucchini Casserole gluten-free?
Absolutely! This recipe is naturally gluten-free due to its ingredients.
How do I know when my casserole is done?
The casserole should be golden brown on top and firm when gently shaken.
Final Thoughts
This Keto Zucchini Casserole is a delightful option that combines comfort food with healthy ingredients. Its cheesy goodness and versatility make it perfect for any occasion. You can customize it by adding more veggies or different cheeses. Give it a try, and enjoy a low-carb dish that’s sure to please!
Keto Zucchini Casserole
Keto Zucchini Casserole is a delightful low-carb dish that combines cheesy goodness with fresh zucchini, making it an ideal choice for anyone looking to maintain a healthy lifestyle without sacrificing flavor. This casserole is not only quick to prepare—taking just 10 minutes of prep time—but it’s also packed with three types of cheese that deliver a rich, creamy texture. Whether you’re serving it as a main course or a side dish, this versatile recipe is perfect for family dinners, potlucks, or meal prep. Enjoy the buttery texture and savory taste while keeping your carb count low!
- Prep Time: 10 minutes
- Cook Time: 25 minutes
- Total Time: 35 minutes
- Yield: About 8 servings 1x
- Category: Side Dish
- Method: Baking
- Cuisine: Keto
Ingredients
- 4 cups shredded 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)
- 1/2 cup crushed beef rinds or Parmesan cheese crisps
- 3 tbsp butter
Instructions
- Preheat oven to 375°F. Spray an 8” x 8” baking dish with non-stick cooking spray.
- Squeeze excess moisture from the shredded zucchini using cheesecloth or a kitchen towel and place in a mixing bowl.
- Add diced onion, minced garlic, beaten eggs, mozzarella, cheddar, and half of the Parmesan to the bowl. Mix well.
- Transfer mixture to the prepared baking dish and bake for about 20 minutes.
- Meanwhile, melt butter and combine with crushed beef rinds (or Parmesan crisps) and remaining Parmesan in a separate bowl.
- After 20 minutes, sprinkle topping mixture over the casserole and bake for another 5-8 minutes until golden brown.
Nutrition
- Serving Size: 1 serving
- Calories: 250
- Sugar: 3g
- Sodium: 450mg
- Fat: 18g
- Saturated Fat: 10g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 7g
- Fiber: 2g
- Protein: 14g
- Cholesterol: 170mg