My grandmother surprised us with this 3 ingredient staple. We were all literally fighting over the last spoonful before the party truly started.

This 3-ingredient parmesan crusted zucchini is one of those accidental family staples that shows up at every get-together. My grandmother first made it as a quick “snack plate” while we were all waiting for the real party food, and we ended up hovering over the dish, literally fighting over the last spoonful before dinner even started. It’s simple, budget-friendly, and uses basic ingredients you probably already have: fresh zucchini, grated parmesan, and a little olive oil. The result is tender, pale green slices of squash under a salty, golden-brown cheese crust that looks as cozy and homemade as it tastes.

Parmesan crusted zucchini served on a white plate

Serve this parmesan crusted zucchini warm on a simple white plate as an easy appetizer or side dish. It’s great alongside roast chicken, grilled steak, or baked salmon, and it also fits nicely on a snack board with crackers, olives, and cured meats.

For a casual weeknight, I’ll pair it with a big green salad and some crusty bread to soak up any cheesy bits left on the plate. If you’re hosting, make a double batch and keep one tray in the oven while the first disappears—people tend to stand around the pan and eat it straight with forks.

3-Ingredient Parmesan Crusted Zucchini

Servings: 4

Ingredients

4 medium zucchini, thinly sliced into rounds

3 tablespoons olive oil

1 cup finely grated parmesan cheese (freshly grated if possible)

Salt and black pepper, to taste (optional, not counted in 3 ingredients)

Nonstick cooking spray or a little extra olive oil for the pan (optional)

Directions

Preheat your oven to 425°F (220°C). Lightly grease a large baking sheet or shallow baking dish with nonstick cooking spray or a thin layer of olive oil so the zucchini doesn’t stick.

Wash the zucchini and trim off the ends. Slice into rounds about 1/4-inch thick. Try to keep the slices roughly the same thickness so they cook evenly and get tender at the same time.

Freshly sliced zucchini rounds on a cutting board

In a large bowl, toss the zucchini rounds with the olive oil until every piece is lightly coated. If using, season with a small pinch of salt and a few grinds of black pepper. Go easy on the salt because the parmesan is naturally salty.

Spread the oiled zucchini slices in a single, slightly overlapping layer on the prepared baking sheet. It’s okay if the edges touch, but avoid stacking them on top of each other or they’ll steam instead of roasting.

Sprinkle the grated parmesan evenly over the zucchini, making sure each slice gets a good layer of cheese. Don’t worry if some cheese falls directly onto the pan—those little crispy bits are the best part everyone fights over.

Zucchini rounds topped with parmesan on a baking sheet

Place the baking sheet on the middle rack and bake for 15–20 minutes, until the zucchini is tender and the parmesan is melted and starting to turn golden.

Turn the oven to broil on high for 1–3 minutes, watching closely, until the cheese is deeply golden brown and forms a bubbly, crusty layer on top. Every oven broils a little differently, so don’t walk away.

Remove from the oven and let the zucchini rest on the pan for about 5 minutes. This helps the cheesy crust set up a bit so it’s easier to scoop without falling apart.

Freshly baked zucchini with golden parmesan crust

Use a wide spatula or large spoon to gently lift the parmesan crusted zucchini onto a simple white serving plate, scraping up any crispy cheese from the pan and piling it on top. Serve warm while the cheese is still melty and the edges are crisp.

Variations & Tips

To stretch this into a bigger side dish for a crowd, you can add thinly sliced yellow squash in with the zucchini while keeping the same amount of parmesan and oil. For extra flavor without adding more ingredients, try a coarser grate of parmesan for a crunchier top, or a finer grate for a more even, melty crust. If you want a little kick, sprinkle freshly cracked black pepper or a pinch of red pepper flakes over the cheese before baking.

Parmesan crusted zucchini served family-style with crispy cheese bits

For a lighter version, you can reduce the olive oil to 2 tablespoons and line the pan with parchment paper to prevent sticking. To make this more of a snack or party bite, cut the zucchini into slightly thicker rounds and bake a few minutes longer so they hold up like cheesy “chips.”

Food safety tips: Wash the zucchini well under running water and dry it before slicing, especially if you’re leaving the skin on. Use a sharp knife and stable cutting board to keep your slices even and your fingers safe. Store any leftovers in an airtight container in the refrigerator and eat within 3 days; reheat in the oven or toaster oven until hot and the cheese is re-crisped. Discard leftovers that have been left at room temperature for more than 2 hours, especially at warm, crowded parties where dishes tend to sit out.

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