Zucchini Pie Recipe

The best zucchini pie recipe for a firm, clean slice uses a partially blind-baked 9-inch crust, well-salted zucchini that has been squeezed dry, and a moderate oven temperature so the eggs set without making the filling watery. A combination of mozzarella for melt, Parmesan for flavor, and two eggs gives the pie structure while still keeping the center tender.

This savory zucchini pie works with homemade pastry, refrigerated pie dough, or a crustless baking dish. The important decisions are not the brand of crust or cheese, but how much moisture you remove from the zucchini and how carefully you check doneness.

Zucchini Pie Recipe at a Glance

Ingredients

• 1 single 9-inch pie crust, homemade or refrigerated
• 2 pounds medium zucchini, approximately 3 to 4 zucchini
• 1 teaspoon fine salt, divided
• 1 tablespoon olive oil or unsalted butter
• 1 small yellow onion, finely diced
• 2 garlic cloves, minced
• 2 large eggs
• 1/2 cup whole milk or half-and-half
• 1 cup shredded low-moisture mozzarella
• 1/2 cup finely grated Parmesan
• 2 tablespoons chopped fresh basil or parsley
• 1/4 teaspoon black pepper
• 1/4 teaspoon dried thyme or Italian seasoning

Choose zucchini that feels firm and has unbroken skin. Very large zucchini can work, but their seeds and spongy centers hold more water; if using them, cut away the soft seeded middle before grating. Low-moisture mozzarella is preferable to fresh mozzarella because it releases less liquid during baking.

How to Make This Zucchini Pie Recipe

1. Prepare the crust

Fit the pastry into a 9-inch pie plate, crimp the edge, and chill it for at least 20 minutes. Prick the bottom several times with a fork, line it with parchment, and fill it with pie weights or dried beans.

Bake at 400°F for 12 minutes. Remove the parchment and weights, then bake for another 5 to 8 minutes, until the bottom looks dry but is not deeply browned. This partial bake prevents the zucchini filling from soaking directly into raw pastry.

2. Salt and drain the zucchini

Grate the zucchini on the large holes of a box grater. Toss it with 3/4 teaspoon of the salt and leave it in a colander for 15 to 20 minutes. Transfer it to a clean kitchen towel or several layers of cheesecloth and twist firmly until the liquid stops streaming.

For a particularly firm pie, weigh the zucchini after squeezing. You want approximately 12 to 14 ounces of drained zucchini from the original 2 pounds. This is the main moisture-control step: excess water prevents the eggs from setting and produces a wet layer beneath the crust.

3. Cook the aromatics and zucchini

Heat the oil or butter in a wide skillet over medium heat. Cook the onion for 4 to 5 minutes, until translucent. Add the garlic and cook for 30 seconds.

Add the squeezed zucchini and the remaining 1/4 teaspoon salt. Cook for 5 to 7 minutes, stirring occasionally, until the zucchini looks glossy and most visible steam has disappeared. Spread the mixture on a plate and cool for 10 minutes.

Do not skip this short skillet step. It evaporates additional water and softens the zucchini so the filling does not collapse after baking. The mixture should be warm, not hot, before the eggs are added.

4. Mix the custard and cheese

Whisk the eggs, milk, black pepper, and thyme in a bowl. Stir in the mozzarella, Parmesan, herbs, and cooled zucchini mixture. Taste a small amount of the filling before it goes into the crust, adjusting seasoning if needed.

Pour the filling into the partially baked crust and spread it evenly. The filling should reach close to the rim but should not form a mound higher than the pastry edge. If your pie plate is shallow, reserve a few spoonfuls rather than overfilling it.

5. Bake until the center is set

Reduce the oven to 375°F and bake for 35 to 45 minutes. Rotate the pie once if your oven browns unevenly. The edge should be puffed and lightly golden, while the center should move as one piece with only a small, gentle wobble.

For a more precise check, insert an instant-read thermometer into the center without touching the pan. Aim for approximately 160°F to 165°F. The residual heat will continue setting the eggs as the pie rests.

6. Rest before cutting

Cool the pie on a rack for 20 to 30 minutes. Cutting immediately can make even a properly baked filling look loose because the custard has not finished firming. Use a sharp knife and wipe the blade between slices for cleaner portions.

Crust Choices and Their Trade-Offs

A standard shortcrust is the most dependable choice when the goal is a firm wedge that lifts cleanly. A frozen shell can work well, but check its capacity: many shallow shells hold only 3 to 4 cups, while this filling is designed for roughly 5 cups. Overfilling causes spills and lengthens baking time.

Cheese Substitutions That Keep the Filling Firm

• Gruyère: Replace the mozzarella with 1 cup grated Gruyère for a deeper, nuttier flavor. It melts smoothly and is relatively low in moisture.
• Sharp cheddar: Use 1 cup finely shredded cheddar. Choose a firm, aged cheddar rather than a very moist young cheese.
• Fontina: Replace the mozzarella with 1 cup Fontina for a creamy melt. Add the Parmesan as written for additional structure and salt.
• Feta: Use 3/4 cup crumbled feta in place of the mozzarella. Feta does not melt into a smooth layer, but it gives the pie a pleasantly firm, savory texture.
• Cottage cheese or ricotta: Use no more than 1/2 cup, and drain it first. These cheeses add softness and water, so reduce the milk to 1/4 cup.
• Vegan cheese: A plant-based shredded cheese can be used, but melt and moisture vary widely. Keep the Parmesan-style substitute to about 1/3 cup and expect a softer filling.

Avoid replacing all the cheese with fresh mozzarella, burrata, or another high-moisture cheese unless it is drained overnight and patted dry. These choices can introduce enough water to undermine the crust and leave a wet center.

Moisture Control: The Difference Between Firm and Watery

There are four useful checkpoints. First, salt the grated zucchini before cooking so its water is drawn out. Second, squeeze it firmly rather than merely letting it drain. Third, cook it in a wide skillet, where steam can escape. Fourth, cool the cooked vegetables before combining them with the eggs.

The amount of zucchini also matters. Two pounds of raw zucchini may look excessive, but grating and squeezing removes a substantial amount of water and reduces its volume. If you use only 1 pound, the pie will be thinner and more egg-forward. If you use 3 pounds without increasing the crust and egg mixture, the center is more likely to remain wet.

Do not cover the pie during the main bake unless the crust edge is becoming too dark. Foil traps steam and slows moisture evaporation. If the edge browns early, shield only the rim with a loose foil ring while leaving the center exposed.

How to Tell When Zucchini Pie Is Done

• Visual test: The outer 2 inches should look set, and the center should no longer appear liquid or glossy.
• Movement test: Gently tap the pan. A properly baked pie has a small, unified wobble, not a rippling slosh.
• Temperature test: The center should reach about 160°F to 165°F on an instant-read thermometer.
• Knife test: A knife inserted near the center should come out with moist crumbs and a little melted cheese, not thin liquid custard.
• Resting test: After 20 to 30 minutes, a slice should stand upright. If it spreads, return the remaining pie to a 325°F oven for 10 to 15 minutes.

Do not judge doneness only by the browned cheese on top. Cheese can brown while the egg mixture underneath is still loose. The center movement and internal temperature are more reliable indicators.

Storage, Reheating, and Common Mistakes

Refrigerate leftovers within two hours in a covered container and use them within 3 to 4 days for best quality. Reheat individual slices at 325°F for 10 to 15 minutes, or microwave them in short intervals until warm. An oven or toaster oven preserves the crust better than the microwave.

The most common mistake is using grated zucchini without squeezing it. The second is skipping the blind bake, especially with a thick or homemade crust. Other problems include adding hot vegetables to the eggs, using a shallow shell for a deep filling, slicing before the rest period, and substituting a large quantity of fresh cheese without draining it.

For advance preparation, drain and cook the zucchini up to one day ahead, then refrigerate it in a sealed container. Assemble the filling shortly before baking. Fully baked zucchini pie can also be refrigerated, but the crust will soften gradually, so it is best served within the first two days.

Frequently Asked Questions

Can I make this zucchini pie without a crust?

Yes. Grease a 9-inch pie plate, sprinkle it with 1 to 2 tablespoons of breadcrumbs, and pour in the filling. Bake at 375°F for approximately 30 to 40 minutes, then rest for at least 20 minutes. The crustless version is more delicate but still slices well when completely set.

Why is my zucchini pie watery in the middle?

The zucchini probably retained too much water, or the pie was removed before the center reached about 160°F to 165°F. Squeeze the salted zucchini in a towel, cook it until steaming has mostly stopped, and use the visual, movement, or thermometer tests rather than relying on surface browning.

Can I use frozen zucchini?

Yes, but thaw it completely and squeeze it very firmly because frozen zucchini releases more water after thawing. Cook it in a wide skillet until the mixture looks fairly dry before combining it with the eggs. The texture may be softer than pie made with fresh zucchini.

Can I prepare zucchini pie the night before?

You can bake it the night before and refrigerate it after it has cooled. Reheat it at 325°F until the center is warm, or serve it cool or at room temperature. For the crispest crust, do not assemble an unbaked pie several hours in advance because the filling will gradually soak into the pastry.

How do I keep the crust from becoming soggy?

Blind-bake the crust until its bottom looks dry, squeeze and cook the zucchini, and avoid overfilling the pan. A metal pie plate usually transfers heat more quickly than a thick glass or ceramic dish, which helps the bottom set. Resting the finished pie also prevents hot filling from collapsing onto the crust when cut.