Crustless Zucchini Quiche Recipe

Crustless Zucchini Quiche Recipe tastes rich and cheesy with tender zucchini, takes about 50 minutes start to finish, and works perfectly for breakfast, brunch, or a light dinner. Busy home cooks who want something low carb, kid friendly, and make-ahead friendly will love this one. I tested this on a Monday morning with bedhead and coffee in hand, so you know it passed the real-life stress test.

Why You Should Try This Crustless Zucchini Quiche Recipe

This crustless zucchini quiche recipe packs in a ton of veggies without feeling like “health food.” The eggs bake up custardy, the cheese melts into little pockets of salty goodness, and the zucchini stays soft but not mushy.

You skip the pie crust, so you save time and cut carbs, but the quiche still slices cleanly and feels brunch-worthy. It works warm, room temperature, or cold, so you can serve it fresh or tuck it into the fridge for grab-and-go breakfasts.

“This crustless zucchini quiche recipe tasted like a fancy café brunch with zero fuss at home, and my whole family asked for seconds. ★★★★★”

Ingredients You’ll Need

Eggs & Dairy

• 6 large eggs
• 1 cup whole milk or half-and-half
  • Whole milk gives a lighter texture.
  • Half-and-half gives a richer, creamier quiche.
• 1/2 cup shredded Parmesan cheese
  • Use a good-quality wedge and grate it yourself for best flavor.
• 1 cup shredded cheese
  • Cheddar, Gruyère, Swiss, or a blend all work well.
  • I often use a pre-shredded Mexican blend from the store on busy mornings.

Vegetables & Flavor

• 2 medium zucchini, about 1 pound total, grated or thinly sliced
• 1 small yellow onion, finely chopped
• 2 cloves garlic, minced
• 2 tablespoons chopped fresh herbs
  • Parsley, basil, chives, or a mix
  • Use 2 teaspoons dried Italian seasoning if you do not have fresh herbs
• 2 tablespoons olive oil or butter
• 1/2 teaspoon kosher salt, plus more to taste
• 1/4 teaspoon black pepper
• 1/4 teaspoon red pepper flakes (optional, for a mild kick)

Pantry Shortcuts & Substitutions

• Use frozen shredded zucchini if you thaw it and squeeze out extra moisture.
• Swap onion with 2 green onions, thinly sliced, if you want a milder flavor.
• Use garlic powder (1/2 teaspoon) if you do not have fresh garlic.
• Add 1/2 cup cooked bacon bits, diced ham, or cooked breakfast sausage for a meatier version.
• Toss in 1/2 cup chopped roasted red peppers or sun-dried tomatoes for extra flavor.

Equipment

• 9-inch pie dish or 9-inch square baking dish
• Large skillet
• Mixing bowl
• Whisk
• Box grater or food processor with shredding disk for zucchini and cheese
• Clean kitchen towel or cheesecloth to squeeze zucchini
• Measuring cups and spoons

Tips & Tricks

• Squeeze the zucchini very well so the quiche sets nicely and does not turn watery.
• Sauté the onion and garlic until they turn soft and fragrant to build flavor.
• Use room temperature eggs for easier mixing and a smoother custard.
• Grease the baking dish generously so slices lift out cleanly.
• Do not overbake; pull the quiche when the center still has a slight jiggle.
• Let the quiche rest 10 to 15 minutes before slicing so it firms up.
• Season the egg mixture generously; bland eggs make a bland quiche.
• Shred cheese at home when possible; it melts better than bagged cheese with anti-caking agents.
• Add cooked meats or extra veggies in small amounts so you do not overcrowd the custard.
• Bake on a middle rack so the top browns gently without burning.

How to Make Crustless Zucchini Quiche Recipe

Step 1: Prep the Zucchini

Preheat your oven to 375°F and grease your pie dish or baking dish. Wash the zucchini and trim the ends. Grate the zucchini on the large holes of a box grater or slice it very thin.

Place the zucchini in a clean kitchen towel. Twist and squeeze over the sink until you remove as much liquid as possible. This step keeps the crustless zucchini quiche recipe firm and not soggy.

Step 2: Cook the Aromatics

Heat the olive oil or butter in a large skillet over medium heat. Add the chopped onion and cook 3 to 5 minutes until it turns soft and lightly golden. Stir in the garlic and cook 30 seconds until it smells fragrant.

Add the squeezed zucchini to the skillet. Season with a pinch of salt and pepper and cook 3 to 4 minutes to cook off a bit more moisture. Turn off the heat and let the mixture cool slightly.

Step 3: Mix the Egg Custard

Crack the eggs into a large mixing bowl. Whisk until the yolks and whites combine and look smooth. Pour in the milk or half-and-half and whisk again.

Stir in the Parmesan, shredded cheese, herbs, salt, pepper, and red pepper flakes if you use them. Taste a small spoonful of the mixture and adjust the seasoning if needed. You want the mixture to taste well seasoned at this stage.

Step 4: Combine Filling and Eggs

Add the slightly cooled zucchini and onion mixture to the egg bowl. Stir gently until everything distributes evenly. You should see zucchini and cheese throughout the custard, not clumped in one spot.

Pour the mixture into the greased baking dish. Use a spatula to spread the zucchini and cheese evenly. Smooth the top so the quiche bakes level.

Step 5: Bake the Quiche

Place the dish on the middle rack of the oven. Bake 30 to 35 minutes until the edges puff and turn golden and the center looks mostly set with a tiny jiggle. If the top browns too quickly, tent the dish loosely with foil.

Check doneness by inserting a knife or toothpick near the center. It should come out mostly clean with no runny egg. Take the quiche out of the oven and set it on a rack.

Step 6: Rest, Slice, and Serve

Let the crustless zucchini quiche rest 10 to 15 minutes. This rest time lets the custard finish setting and makes slicing easier. Run a knife around the edge if it sticks slightly.

Slice into wedges or squares, depending on your dish. Serve warm, at room temperature, or chilled from the fridge. I often pack leftovers in lunch containers with a simple salad for an easy meal.

What to Serve with Crustless Zucchini Quiche Recipe

Serve this crustless zucchini quiche recipe with a crisp green salad, sliced tomatoes, or a simple cucumber salad for a light meal. Add fresh fruit like berries, melon, or orange slices to round out a brunch spread. Warm toast, English muffins, or roasted potatoes make the meal feel more hearty.

For drinks, pair it with hot coffee, iced coffee, herbal tea, or a smoothie. Kids usually enjoy it with a glass of cold milk or a fruit juice spritzer. You can also serve it as part of a bigger brunch table with yogurt, granola, and muffins.

Storage Options

• Refrigerate leftovers in an airtight container for up to 4 days.
• Cool the quiche completely before you cover and chill it.
• Freeze individual slices tightly wrapped in plastic, then place them in a freezer bag for up to 2 months.
• Reheat slices in a 325°F oven or toaster oven for 10 to 15 minutes until warm.
• Use the microwave for quick reheating in 30-second bursts, though the texture stays better with oven reheating.

Crustless Zucchini Quiche Recipe

Crustless Zucchini Quiche tastes rich and cheesy with tender zucchini, takes about 50 minutes start to finish, and works perfectly for breakfast, brunch, or a light dinner. It’s low carb, kid friendly, and make-ahead friendly.

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Prep Time 15 minutes mins

Cook Time 35 minutes mins

Total Time 50 minutes mins

Servings: 6

Course: Breakfast, Drinner

Ingredients

  

• 2 medium zucchini, about 1 pound total, grated and well squeezed
• 1 small yellow onion, finely chopped
• 2 cloves garlic, minced
• 2 tablespoons olive oil or butter
• 6 large eggs, at room temperature
• 1 cup whole milk or half-and-half
• 1/2 cup shredded Parmesan cheese
• 1 cup shredded cheese (Cheddar, Gruyère, Swiss, or a blend)
• 2 tablespoons chopped fresh herbs (such as parsley, basil, or chives)
• 1/2 teaspoon kosher salt, plus more to taste
• 1/4 teaspoon black pepper
• 1/4 teaspoon red pepper flakes

Instructions

 

1. Preheat the oven to 375°F (190°C) and generously grease a 9-inch pie dish or 9-inch square baking dish.
2. Wash the zucchini, trim the ends, and grate on the large holes of a box grater. Place the grated zucchini in a clean kitchen towel and squeeze firmly over the sink to remove as much liquid as possible.
3. Heat the olive oil or butter in a large skillet over medium heat. Add the chopped onion and cook for 3 to 5 minutes until softened and lightly golden. Stir in the minced garlic and cook for 30 seconds until fragrant.
4. Add the well-squeezed zucchini to the skillet, season with a pinch of salt and pepper, and cook for 3 to 4 minutes to cook off excess moisture. Remove from the heat and let the mixture cool slightly.
5. In a large mixing bowl, whisk the eggs until smooth. Add the milk or half-and-half and whisk again until well combined.
6. Stir in the Parmesan, shredded cheese, fresh herbs, salt, black pepper, and red pepper flakes if using. Taste a small spoonful and adjust the seasoning if needed so the mixture is well seasoned.
7. Add the slightly cooled zucchini and onion mixture to the egg mixture and stir gently until the vegetables and cheese are evenly distributed throughout the custard.
8. Pour the mixture into the prepared baking dish and spread it into an even layer, smoothing the top with a spatula.
9. Bake on the middle rack for 30 to 35 minutes, until the edges are puffed and golden and the center is mostly set with a slight jiggle. If the top browns too quickly, tent the dish loosely with foil.
10. Check doneness by inserting a knife or toothpick near the center; it should come out mostly clean without runny egg. Remove the quiche from the oven and place on a rack.
11. Let the quiche rest for 10 to 15 minutes so the custard can finish setting. Run a knife around the edge if needed, then slice into wedges or squares and serve warm, at room temperature, or chilled.

Notes

Nutrition Information
Approximate per serving (1/6 of recipe, made with whole milk, olive oil, and Cheddar): 230–260 calories; fat 18 g; saturated fat 8 g; carbohydrates 5 g; fiber 1 g; sugars 3 g; protein 13 g; sodium 480 mg. Values will vary based on cheese choice, milk vs. half-and-half, and exact portion size.

Storage: Refrigerate cooled quiche in an airtight container for up to 4 days. Reheat in a 325°F oven or toaster oven until warmed through, or microwave briefly if preferred.