Name: Zucchini Pizza Casserole
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Cuisine: American
Ingredients: 4 cups shredded zucchini; 1/2 teaspoon salt; 2 large eggs; 1/2 cup grated Parmesan cheese; 1 cup shredded mozzarella cheese (from 2 cups total); 1 pound ground beef; 1/2 cup chopped onion; 2 cups pizza sauce; 1 green bell pepper, chopped; 1/2 cup sliced mushrooms; 1/2 teaspoon dried oregano; 1/2 teaspoon garlic powder; 1/4 teaspoon black pepper; 1 cup shredded mozzarella cheese; 1 cup shredded cheddar cheese

Jump to Recipe·Print Recipe

And if you’re dealing with a busy schedule, picky eaters, or that mysterious mountain of zucchini that shows up every summer like it pays rent… this recipe is the solution. You get a hearty dinner that feels fun, tastes like a treat, and still sneaks in veggies like a ninja in yoga pants.

Why You’ll Love This Zucchini Pizza Casserole

Low-carb comfort food. The zucchini crust is sturdy and satisfying when you squeeze out that moisture (more on that in a second).
Family-friendly + customizable. You can adjust toppings like you’re taking orders at a pizzeria… minus the hat.

Ingredients You’ll Need

For the Zucchini Crust

4 cups shredded zucchini – Moisture + gentle sweetness. (We’ll drain it so it behaves.)
1/2 teaspoon salt – Pulls water out of the zucchini so your crust isn’t a puddle.
1/2 cup grated Parmesan cheese – Adds big flavor and helps the crust firm up.
1 cup shredded mozzarella (half of the 2 cups total) – Mixed in for that melty, pizza-like base.

For the Filling

1 pound ground beef – Hearty and satisfying.
1/2 cup chopped onion – Sweet, savory depth.
1 green bell pepper, chopped – Crunchy, fresh texture.
1/2 cup sliced mushrooms – Earthy and perfect for soaking up sauce.
1/2 teaspoon dried oregano – Classic pizza herb energy.
1/2 teaspoon garlic powder – Flavor without extra chopping.
1/4 teaspoon black pepper – Just enough bite.

For the Topping

1 cup shredded mozzarella (the rest) – Gooey, bubbly magic.

How to Make Zucchini Pizza Casserole (Step-by-Step)

Step 1: Preheat the Oven

Preheat your oven to 400°F (200°C). This helps your casserole bake evenly and gives you that golden, bubbly top we all “accidentally” pick at before dinner.

Step 2: Salt the Zucchini

In a large bowl, toss your 4 cups shredded zucchini with 1/2 teaspoon salt. Let it sit for 10 minutes. This is the zucchini sweat session—important for a crust that holds up.

Step 3: Drain Like You Mean It

“Wow, this is amazing!”
and
“Why is my casserole… soup?”

Step 4: Mix the Crust

In a bowl, combine:

drained zucchini
2 eggs
1/2 cup Parmesan
1 cup mozzarella (half your mozzarella)

Stir until it looks like a thick, cohesive mixture.

Step 5: Press into the Pan

Grease a 9×13-inch baking dish with cooking spray or olive oil. Press the zucchini mixture evenly into the bottom, about 1/2 inch thick. Smooth it out so it bakes evenly.

Step 6: Bake the Crust

Bake for 20 minutes, until set and lightly browned around the edges. It should feel firm when you tap it.

Step 7: Brown the Beef and Onion

Step 8: Build the Pizza Filling

To the skillet, add:

2 cups pizza sauce
green bell pepper
mushrooms
oregano
garlic powder
black pepper

Simmer for 5 minutes so everything gets cozy together.

Step 9: Layer It Up

Remove your baked crust from the oven. Spread the beef mixture evenly over the crust. Get those corners too—nobody wants a sad edge piece.

Step 10: Add the Cheese Topping

Sprinkle the remaining mozzarella and all the cheddar over the top. Cover it like you mean it.

Step 11: Bake Again

Step 12: Cool and Serve

Let it rest for a few minutes before slicing. This helps it hold together when you cut squares. Then serve it up and accept compliments graciously.

Aneta’s Little Kitchen Story

The first time I made this, it was one of those nights where I wanted pizza—my family wanted pizza—and my brain wanted not to make a whole production out of dinner. I had zucchini in the fridge and ground beef to use up, and I thought, “What if we just… casserole this situation?”

Cooking Tips for the Best Results

Squeeze zucchini super dry. If you think it’s dry enough, squeeze once more. Zucchini is sneaky.
Want extra crisp edges? After the crust bakes, you can carefully blot any moisture on top with a paper towel before adding the filling.
Prefer turkey? Ground turkey works great—just season it a little more since it’s leaner.
Cheese browning too fast? Loosely tent with foil for the last few minutes.

Zucchini Pizza Casserole topped with melted mozzarella and cheddar, ground beef, mushrooms, and zucchini slices on a plate with pizza sauce. — This Zucchini Pizza Casserole is stacked with zucchini, savory beef, and bubbly melted cheese—pure pizza-night comfort in casserole form.

FAQs About Zucchini Pizza Casserole

Can I make Zucchini Pizza Casserole ahead of time?

Yes! You can bake the crust and prep the filling ahead. Store separately, then assemble and bake when ready. It’s a lifesaver on busy nights.

How do I store leftovers?

Keep leftovers in an airtight container in the fridge for 3–4 days. Reheat in the oven or air fryer if you want it less soft than the microwave version.

Can I freeze it?

What can I use instead of mushrooms or bell pepper?

Totally flexible. Try chopped spinach, black olives, pepperoni, or even diced zucchini (because apparently zucchini never stops).

Ready for Pizza Night Magic?

If pizza is comfort and casseroles are easy, then Zucchini Pizza Casserole is basically the best of both worlds—cheesy, hearty, and weeknight-friendly. Make it once and you’ll see why it earns a permanent spot in the dinner rotation… especially when you want something cozy that still feels like a treat.

Keep the Zucchini Magic Going

If you loved this Zucchini Pizza Casserole, here are a few more cozy, flavor-packed recipes to try next—perfect for when you want the same “pizza night” comfort, more zucchini goodness, or an easy dinner that keeps everyone happy:

Craving more pizza vibes? Try Chicken Crust Caesar Salad Pizza (a fun, protein-packed twist)
Want a bolder, spicy option? Go for Buffalo Chicken Stuffed Zucchini Boats (a little kick, a lot of comfort)
Need an easy one-pan dinner with zucchini on the side? You’ll love Sheet Pan Hot Honey Garlic Chicken and Zucchini (sweet, sticky, and weeknight-friendly)

And hey—if you made this recipe, I’d love to hear how it went! ⭐ Please leave a quick review and tap your star rating (5 stars makes my whole day, but be honest—I can take it ).