Impossible Zucchini Pie: The Easy Crustless Recipe That Works Every Time

Impossible Zucchini Pie is an easy savory crustless pie made with thinly sliced zucchini, onion, Parmesan, eggs, vegetable oil, and Original Bisquick baking mix. The mixture comes together in one main bowl, then bakes at 400°F (205°C) for about 30–40 minutes while the Bisquick creates its own light crust, so there is no pastry to roll or pre-bake.

The finished pie is golden on top, tender and moist in the center, and pleasantly savory with a gentle marjoram flavor. Although this recipe sometimes appears in dessert or pie categories, it is a classic vegetable side dish that works beautifully for breakfast, brunch, lunch, or a light dinner.

Why You’ll Love This Recipe

This Impossible Zucchini Pie solves the biggest problem with homemade pie: you get a satisfying slice without making a pastry crust. The Bisquick mixture blends with the eggs and vegetables during baking, creating a light, tender crust around a soft zucchini center.

It is also a practical way to use a generous supply of summer zucchini. The ingredients are simple pantry and refrigerator staples, preparation takes only 10–15 minutes, and the finished pie is substantial enough to serve as a vegetarian main course with a salad.

• No rolling pin, pastry dough, or blind baking is needed.
• The recipe makes 6–8 servings from one 9-inch pie plate.
• Parmesan adds salty, nutty flavor without requiring a large amount of cheese.
• The pie works for breakfast, brunch, lunch, or dinner.

For another comforting meal idea when you want something hearty and uncomplicated, try this easy stovetop ground turkey chili alongside a simple green salad.

Ingredients You’ll Need

The ingredient list is short, but each item has a job. Zucchini supplies moisture and a tender vegetable texture, onion brings savory sweetness, and eggs bind everything into a sliceable custard-like filling.

• Zucchini: Use about 2–3 medium zucchini to make 3 cups of thin slices. Uniform pieces cook at the same rate.
• Onion: Finely chop 1/2 cup so it softens fully during baking instead of leaving large crunchy pieces.
• Original Bisquick: One cup is the standard formulation for this classic recipe and helps create the pie’s self-forming crust.
• Parmesan: Use 1/2 cup grated Parmesan for savory depth and a lightly browned top.
• Eggs and oil: Four large eggs provide structure, while 1/2 cup vegetable oil contributes tenderness and moisture.
• Seasonings: Dried marjoram, salt, and black pepper keep the flavor classic and balanced.

Grease the 9-inch pie plate thoroughly, including the sides. This makes serving easier and helps the delicate edge release cleanly after the five-minute rest.

If you are planning a brunch spread, the pie pairs nicely with this easy Eggs Benedict recipe for a table filled with familiar breakfast favorites.

How to Make It Step-by-Step

Step 1: Heat the oven to 400°F (205°C), giving it time to reach the proper temperature while you prepare the vegetables. Grease an unbaked 9-inch pie plate with care so the finished slices release without sticking.

Step 2: Add 1 cup Original Bisquick baking mix, 1/2 cup grated Parmesan, 1/2 teaspoon dried marjoram, 1/4 teaspoon salt, and 1/8 teaspoon black pepper to a large bowl. Stir these dry ingredients together so the seasonings and cheese are distributed before the zucchini is added.

Step 3: Stir 3 cups of thinly sliced zucchini and 1/2 cup finely chopped onion into the Bisquick mixture. Turn the vegetables gently but thoroughly until the dry ingredients lightly coat all the slices.

Step 4: In a second bowl, whisk 4 large eggs with 1/2 cup vegetable oil. Continue until the mixture looks evenly blended, since this liquid mixture will provide the moisture needed to activate the baking mix.

Step 5: Pour the eggs and oil into the bowl of zucchini, onion, and dry ingredients. Stir until no large pockets of dry mix remain, taking care not to crush the zucchini slices.

Step 6: Transfer the combined mixture to the prepared pie plate. Spread it evenly from the center toward the edges so the pie bakes at a consistent thickness.

Step 7: Bake for about 30–40 minutes. Begin checking at 30 minutes; the pie is ready when the top is golden, the center is set, and a knife inserted near the center comes out clean.

Step 8: Remove the pie from the oven and let it stand for 5 minutes before cutting. This short rest allows the eggs and self-made crust to finish setting, producing cleaner slices.

Pro Tips for the Best Texture

Zucchini can vary considerably in water content, and excess moisture is the most common reason a vegetable pie turns out loose. If your zucchini looks especially wet, lightly salt it, let it stand for 10 minutes, and pat it dry before combining it with the other ingredients.

Thin, even slices are more important than perfect shapes. A sharp knife or mandoline can help, but cut carefully and aim for pieces that are thin enough to soften fully within the 30–40 minute baking window.

Do not wait for the top to become deeply brown before checking the center. Overbaking can make the pie dry, so look for a set center and a clean knife rather than relying only on color.

Let the pie rest in the plate instead of slicing immediately. Five minutes is enough to firm the structure while keeping the inside moist and tender.

Marjoram gives the traditional recipe its gentle herbal character, but you can replace it with dried parsley, oregano, or Italian seasoning. These alternatives change the flavor slightly while preserving the easy preparation.

Serving Ideas and Pairings

Serve warm or just slightly cooled, cut into wedges. A crisp green salad, sliced tomatoes, or roasted vegetables balance the soft texture and savory richness of the pie.

For breakfast or brunch, add fresh fruit and coffee. If you want a bread option for the table, these soft Hawaiian rolls make a pleasantly sweet contrast to the Parmesan and zucchini.

This pie can also take the place of a side dish beside grilled chicken, roasted fish, or a bowl of soup. Its mild flavor makes it useful for family meals because it does not overpower the main course.

Despite its appearance in dessert or pie categories, this is a savory recipe rather than a sweet one. Save sweet toppings for a different course, and let the golden Parmesan crust and seasoned vegetables take center stage.

Storage, Reheating, and Make-Ahead Notes

Cool leftover pie, cover it, and refrigerate it. For the best texture, enjoy refrigerated leftovers within a few days and reheat individual slices gently until warmed through.

A microwave is convenient for a quick serving, but short heating intervals help prevent the eggs from becoming rubbery. You can also warm slices in a moderate oven until hot, watching closely so the edges do not dry out.

The pie is easiest to serve after its five-minute rest, but it can also be enjoyed at room temperature. That flexibility makes it useful for casual lunches, potlucks, and buffet-style brunches.

If you are planning a dessert table after the savory course, balance the menu with a small treat such as this easy KitKat fudge. A fruit-based option like this peach cobbler also follows the pie nicely.

Impossible Zucchini Pie

A classic savory crustless zucchini pie with Parmesan, onion, eggs, and Bisquick baking mix. It forms its own light crust as it bakes and serves 6–8 people.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 30 minutes mins

Total Time 45 minutes mins

Servings: 6 servings

Ingredients Method Notes

Ingredients

  

Main Ingredients

• 3 cups Thinly sliced zucchini
• 1/2 cup Finely chopped onion
• 1 cup Original Bisquick baking mix
• 1/2 cup Grated Parmesan cheese
• 1/2 cup Vegetable oil
• 4 Large eggs

Seasonings

• 1/2 teaspoon Dried marjoram
• 1/4 teaspoon Salt
• 1/8 teaspoon Black pepper

Method

 

Step-by-Step

1. Heat the oven to 400°F (205°C) and grease one unbaked 9-inch pie plate.
2. In a large bowl, combine the Original Bisquick baking mix, Parmesan cheese, dried marjoram, salt, and black pepper.
3. Stir the thinly sliced zucchini and finely chopped onion into the dry mixture until the vegetables are evenly coated.
4. In a separate bowl, whisk the four eggs and vegetable oil together until blended.
5. Pour the egg-and-oil mixture into the zucchini mixture and stir until everything is evenly combined.
6. Transfer the mixture to the greased pie plate and spread it into an even layer.
7. Bake for about 30–40 minutes, beginning to check at 30 minutes, until the center is set, the top is golden, and a knife inserted near the center comes out clean.
8. Let the pie stand for 5 minutes before slicing and serving.

Notes

Slice zucchini thinly and uniformly. If it is especially watery, lightly salt it, let it stand for 10 minutes, and pat it dry before mixing. Do not overbake, since the pie should remain moist. Dried parsley, oregano, or Italian seasoning may replace the marjoram.

Final Thoughts

Impossible Zucchini Pie earns its place in the regular recipe rotation because it delivers a homemade-looking pie with remarkably little work. Thin zucchini, onion, Parmesan, eggs, oil, and one cup of Bisquick combine into a golden, crustless dish that is both comforting and dependable.

Remember the essentials: use even zucchini slices, dry especially watery zucchini, check the pie at 30 minutes, and give it a five-minute rest before slicing. Once you see how the baking mix creates its own light crust, this classic savory pie becomes an easy answer for extra zucchini, brunch guests, or a simple family dinner.

Serve each wedge warm with a fresh salad or your favorite vegetables, and enjoy the contrast between the lightly crisp top and moist, tender center. It is proof that an uncomplicated recipe can still make an inviting centerpiece for the table.