Zucchini Pizza Casserole Recipe

Zucchini Pizza Casserole Recipe tastes like cheesy, saucy comfort food with a fresh veggie twist that still satisfies every pizza craving. It works perfectly for busy families, low carb eaters, or anyone who wants a cozy weeknight dinner on the table in about 50 minutes. I tested this in my tiny apartment kitchen while my kids argued about toppings, so you know it passed the picky-eater test.

Why Zucchini Pizza Casserole Recipe Is Worth It

This Zucchini Pizza Casserole Recipe gives you all the flavors of a loaded pan pizza without a heavy crust. The zucchini bakes into a tender, cheesy base that holds the sauce and toppings like a crust, so you still get those classic pizza layers.

You sneak in a big serving of vegetables without anyone feeling punished. The recipe uses simple pantry ingredients, so you probably own most of what you need already.

My whole family devoured this Zucchini Pizza Casserole Recipe and asked for seconds, which never happens with a veggie-heavy dinner ★★★★★

Ingredients You Need

Zucchini base

• 4 cups shredded zucchini (about 3 medium zucchini)
  • Pat the shreds very dry with towels so the casserole stays firm.
• 2 large eggs
• 1 cup shredded mozzarella cheese
• 1/2 cup grated Parmesan cheese
• 1/2 teaspoon garlic powder
• 1/2 teaspoon onion powder
• 1/2 teaspoon dried Italian seasoning
• 1/2 teaspoon kosher salt
• 1/4 teaspoon black pepper

Sauce and toppings

• 1 to 1 1/4 cups pizza sauce or thick marinara
  • Use a thicker sauce like Rao’s or Classico so the casserole does not turn watery.
• 1 1/2 cups shredded mozzarella cheese, divided
• 1/2 cup shredded cheddar or provolone cheese
• 1/2 pound Italian sausage, cooked and crumbled
  • Use turkey sausage for a lighter version or plant based crumbles for vegetarian.
• 1/2 cup sliced pepperoni
• 1/2 cup sliced mushrooms (optional)
• 1/2 cup diced bell pepper (any color)
• 1/4 cup sliced black olives (optional)
• 2 tablespoons grated Parmesan for topping
• 1 teaspoon dried oregano for sprinkling

Pantry shortcuts and notes

Use pre shredded mozzarella and Parmesan to save time, but pick low moisture cheese so the casserole sets nicely. Jarred pizza sauce keeps prep easy and consistent, and you can choose spicy or mild. Use pre sliced pepperoni and canned olives to cut chopping time.

Equipment list

• 9×13 inch baking dish
• Large mixing bowl
• Box grater or food processor with shredding disk
• Clean kitchen towels or cheesecloth for squeezing zucchini
• Skillet for browning sausage
• Rubber spatula or wooden spoon
• Measuring cups and spoons

Quick Tips & substitutions

• Squeeze the zucchini very dry so the base bakes firm and sliceable.
• Line the baking dish with a light coat of oil or cooking spray so slices lift out cleanly.
• Use turkey sausage or chicken sausage to cut some fat without losing flavor.
• Swap sausage and pepperoni for plant based crumbles and extra veggies for a vegetarian version.
• Use part skim mozzarella if you want a lighter Zucchini Pizza Casserole Recipe that still tastes cheesy.
• Choose a thick pizza sauce so the casserole does not turn soupy.
• Add a pinch of red pepper flakes to the sauce if your crowd likes a little heat.
• Prep the zucchini base earlier in the day and keep it in the fridge, then bake and top right before dinner.

How to Make Zucchini Pizza Casserole Recipe

Step 1: Prep the zucchini

Preheat your oven to 400°F and grease a 9×13 inch baking dish. Shred the zucchini on the large holes of a box grater. Pile the shreds in the center of a clean kitchen towel, twist the towel tightly, and squeeze out as much liquid as you can.

Step 2: Mix the zucchini base

Add the squeezed zucchini to a large mixing bowl. Crack in the eggs, then add 1 cup shredded mozzarella, 1/2 cup Parmesan, garlic powder, onion powder, Italian seasoning, salt, and pepper. Stir until the zucchini mixture looks evenly coated and cheesy.

Step 3: Bake the crust layer

Spread the zucchini mixture into the prepared baking dish in an even layer. Press it down firmly with a spatula so it forms a compact base. Bake this layer for 20 minutes until the edges look lightly golden and the center feels set.

Step 4: Cook the sausage

While the zucchini base bakes, heat a skillet over medium heat. Add the Italian sausage and break it into small crumbles with a spoon. Cook until the sausage browns and no pink remains, then drain off extra fat.

Step 5: Add sauce and toppings

Remove the baked zucchini base from the oven. Spread the pizza sauce evenly over the hot base, leaving a tiny border at the edges. Sprinkle on half of the remaining mozzarella, then add sausage, pepperoni, mushrooms, bell pepper, and olives.

Step 6: Finish with cheese

Top the casserole with the rest of the mozzarella and the shredded cheddar or provolone. Sprinkle the remaining Parmesan and the dried oregano over the top. Make sure the toppings spread evenly so every slice gets a good mix.

Step 7: Bake until bubbly

Return the casserole to the oven and bake for 15 to 20 minutes. Pull it out when the cheese bubbles and turns golden in spots. Let the Zucchini Pizza Casserole Recipe rest for 8 to 10 minutes so it sets and slices cleanly.

Step 8: Slice and serve

Cut the casserole into squares with a sharp knife. Use a spatula to lift out slices and keep the layers intact. Serve hot and watch everyone forget that the crust started as zucchini.

Recipe Variations

• Gluten free: Use gluten free sausage and gluten free pizza sauce, and check labels on pepperoni.
• Low carb: Pick a no sugar added pizza sauce and skip sweet toppings like pineapple.
• Vegetarian: Skip sausage and pepperoni and load on mushrooms, olives, onions, and extra peppers.
• Vegan: Use dairy free shredded cheese, plant based sausage, and a vegan friendly pizza sauce.
• Extra protein: Add cooked diced chicken or extra sausage on top of the zucchini base.
• Kid friendly: Stick to cheese and mild pepperoni, and keep veggies finely diced.
• Spicy: Use hot Italian sausage, add jalapeños, and sprinkle red pepper flakes over the cheese.

Ways to Serve Zucchini Pizza Casserole Recipe

• Pair with a simple green salad with Italian dressing.
• Add garlic bread or breadsticks for bigger appetites.
• Serve with sliced cucumbers, cherry tomatoes, and ranch for a kid friendly plate.
• Pack leftovers in lunch containers with carrot sticks and apple slices.
• Offer a topping bar on the side with extra olives, Parmesan, and crushed red pepper.

Storage Success

Let the Zucchini Pizza Casserole Recipe cool to room temperature, then cover the dish tightly or transfer slices to airtight containers. Store in the fridge for up to 4 days and reheat slices in the oven or air fryer so the edges crisp again. Freeze individual squares on a baking sheet, then wrap them and keep them in a freezer bag for up to 2 months. Reheat from frozen at 350°F until hot in the center and the cheese melts again.

Zucchini Pizza Casserole Recipe

Zucchini Pizza Casserole is a hearty, low-carb main dish that uses shredded zucchini as the crust, topped with seasoned ground beef, pizza sauce, and melted cheese.

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Prep Time 25 minutes mins

Cook Time 40 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings: 8

Course: Lunch

Cuisine: American

Ingredients

  

• 4 cups shredded zucchini (well-drained)
• 2 large eggs, lightly beaten
• 1/2 cup grated Parmesan cheese
• 1 cup shredded mozzarella cheese, divided
• 1 cup shredded cheddar cheese, divided
• 1 pound lean ground beef
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 2 cups pizza or marinara sauce
• 1 teaspoon dried Italian seasoning
• 1/2 teaspoon dried oregano
• 1/4 teaspoon black pepper
• 1/4 teaspoon salt
• 1/4 cup sliced pepperoni
• 2 tablespoons olive oil, for greasing the dish

Instructions

 

1. Preheat the oven to 400°F (200°C). Lightly grease a 9x13-inch baking dish with olive oil.
2. Place the shredded zucchini in a clean kitchen towel and squeeze firmly to remove as much moisture as possible.
3. In a large bowl, combine the drained zucchini, eggs, Parmesan cheese, and half of the mozzarella and cheddar cheese. Mix until well combined.
4. Press the zucchini mixture evenly into the prepared baking dish to form a crust. Bake for 20 minutes or until set and lightly golden around the edges.
5. While the crust bakes, cook the ground beef and onion in a skillet over medium heat until the beef is browned and the onion is tender. Drain excess fat if needed.
6. Stir in the garlic, pizza sauce, Italian seasoning, oregano, pepper, and salt if using. Simmer for 3–5 minutes to blend flavors.
7. Spread the meat and sauce mixture evenly over the baked zucchini crust.
8. Top with the remaining mozzarella and cheddar cheese. Add sliced pepperoni or other favorite pizza toppings if desired.
9. Return to the oven and bake for 15–20 minutes, or until the cheese is melted and bubbly.
10. Let the casserole rest for 5–10 minutes before slicing. Serve warm.

Notes

Nutrition Information
Approximate per serving (1/8 of recipe): 320 calories; fat 22 g; saturated fat 10 g; carbohydrates 9 g; fiber 2 g; sugars 5 g; protein 22 g; sodium 780 mg. Values will vary based on specific ingredient brands, optional toppings, and portion size.