Zucchini Onion Pie is a savory, crustless wonder that transforms humble vegetables into a golden, cheesy delight. Perfect for brunch, light dinners, or potlucks, it’s like a cross between a quiche and a savory cake – packed with flavor yet surprisingly easy to make.
Why You’ll Love This Recipe
- Garden-fresh flavors: Zucchini and onion shine in this simple preparation
- No crust needed: Easier than quiche but just as satisfying
- Meal-prep friendly: Tastes great warm or at room temperature
- Customizable: Swap cheeses or herbs to make it your own
Ingredients
- 2 medium zucchinis, grated
- 1 medium onion, diced
- 3 eggs
- ¼ cup vegetable oil
- 1 teaspoon garlic powder
- ½ teaspoon dried oregano
- ¼ teaspoon mustard powder
- ½ teaspoon salt
- ¼ teaspoon pepper
- 1 cup cheddar cheese, grated
- 3 tablespoons Parmesan cheese, grated
- 1 cup all-purpose flour
- 1 teaspoon baking powder
Directions

Step 1: Prep Vegetables
- Grate zucchinis using the large holes of a box grater. Place in a colander, sprinkle with ½ tsp salt, and let drain 10 minutes.
- Squeeze zucchini firmly in a clean kitchen towel to remove excess moisture.
- Dice onion into ¼-inch pieces.
Step 2: Make Batter
- Preheat oven to 350°F (175°C). Grease a 9-inch pie dish or similar baking dish.
- In a large bowl, whisk eggs and oil until combined.
- Add garlic powder, oregano, mustard powder, salt, and pepper. Whisk to incorporate.
- Stir in grated zucchini, diced onion, cheddar, and Parmesan.
Step 3: Add Dry Ingredients
- Sift flour and baking powder directly into the bowl.
- Gently fold until just combined (don’t overmix).
Step 4: Bake
- Pour batter into prepared dish, smoothing the top.
- Bake 35-40 minutes until golden brown and a toothpick inserted in center comes out clean.
- Let cool 10 minutes before slicing.
Pro Tips and Variations
- Extra crisp top: Broil for 1-2 minutes at the end (watch carefully)
- Cheese swaps: Try Gruyère or mozzarella instead of cheddar
- Add protein: Mix in ½ cup diced ham or cooked bacon
- Gluten-free: Use 1:1 GF flour blend
6. Serving Suggestions
- Breakfast/brunch with sour cream and fresh herbs
- Light dinner with a crisp green salad
- Packed lunch at room temperature
- Appetizer cut into small squares
7. Storage/Reheating
- Fridge: Keep covered for up to 4 days
- Freeze: Wrap slices tightly for up to 2 months
- Reheat: 300°F oven for 10 minutes or microwave briefly
FAQs
Can I use frozen zucchini?
A: Yes, but thaw completely and squeeze out all liquid first.
Why isn’t my pie browning?
A: Try moving it to a higher oven rack or increasing temp to 375°F for last 10 minutes.
Can I make this in muffin tins?
A: Yes! Bake for 20-25 minutes for mini individual portions.
Conclusion
This Zucchini Onion Pie is the perfect way to enjoy summer’s bounty – simple enough for weeknights yet special enough for company. With its golden crust and tender interior, it’s sure to become a seasonal staple!


Zucchini Onion Pie
- Total Time: 1 hour
- Yield: 6 servings
Description
Zucchini Onion Pie: A crustless, cheesy vegetable bake perfect for brunch or dinner. Ready in 1 hour with garden-fresh flavors!
Ingredients
-
2 medium zucchinis, grated
-
1 medium onion, diced
-
3 eggs
-
¼ cup vegetable oil
-
1 teaspoon garlic powder
-
½ teaspoon dried oregano
-
¼ teaspoon mustard powder
-
½ teaspoon salt
-
¼ teaspoon pepper
-
1 cup cheddar cheese, grated
-
3 tablespoons Parmesan cheese, grated
-
1 cup all-purpose flour
-
1 teaspoon baking powder
Instructions
Step 1: Prep Vegetables
-
Grate zucchinis using the large holes of a box grater. Place in a colander, sprinkle with ½ tsp salt, and let drain 10 minutes.
-
Squeeze zucchini firmly in a clean kitchen towel to remove excess moisture.
-
Dice onion into ¼-inch pieces.
Step 2: Make Batter
-
Preheat oven to 350°F (175°C). Grease a 9-inch pie dish or similar baking dish.
-
In a large bowl, whisk eggs and oil until combined.
-
Add garlic powder, oregano, mustard powder, salt, and pepper. Whisk to incorporate.
-
Stir in grated zucchini, diced onion, cheddar, and Parmesan.
Step 3: Add Dry Ingredients
-
Sift flour and baking powder directly into the bowl.
-
Gently fold until just combined (don’t overmix).
Step 4: Bake
-
Pour batter into prepared dish, smoothing the top.
-
Bake 35-40 minutes until golden brown and a toothpick inserted in center comes out clean.
-
Let cool 10 minutes before slicing.
Notes
- Squeezing zucchini is crucial to prevent soggy pie
- Resting time allows flavors to meld and makes slicing cleaner
- Don’t overmix – a few lumps in the batter are fine
- Prep Time: 20 minutes
- Cook Time: 40 minutes
- Category: Main/Side Dish
- Method: Baking
- Cuisine: American
Keywords: zucchini pie, savory vegetable bake, crustless quiche