Name: Zucchini Slice Recipe
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Ingredients: 3 medium zucchini, grated and well squeezed (about 4 cups, lightly packed); 5 large eggs; 1 cup all-purpose flour; 2 teaspoons baking powder; 1 cup shredded cheddar cheese; 1 cup shredded mozzarella or Colby Jack cheese; 1 small onion, finely diced or grated; 2 cloves garlic, minced; 1/3 cup light olive oil or neutral oil (or melted butter); 1 teaspoon fine sea salt; 1/2 teaspoon black pepper; 1 teaspoon dried Italian herbs or dried oregano; 1 pinch red pepper flakes; 1/2 cup cooked bacon bits or diced ham; 1/2 cup corn kernels, peas, or finely diced bell pepper; 2 tablespoons chopped fresh parsley or chives

Zucchini Slice Recipe tastes cheesy, savory, and a little bit herby, with golden edges and a soft, custardy center that feels like a crustless quiche. It works perfectly for busy families, meal prep lovers, and anyone who wants a quick lunch or snack in under about 50 minutes from start to finish. I first baked a version of this in my tiny college apartment, and my roommates still text me photos when they pull a pan out of the oven.

Why Make This Zucchini Slice Recipe at Home

This Zucchini Slice Recipe uses simple ingredients, comes together in one bowl, and bakes into tidy squares that pack easily for lunchboxes. You skip greasy takeout and still get something warm, cheesy, and full of vegetables.

You also control the salt, the cheese, and the add-ins, so picky eaters and adventurous eaters both win. Leftovers taste great cold or reheated, which makes this recipe a quiet hero for busy weeks.

“This Zucchini Slice Recipe tastes like a cheesy quiche and a frittata had a very tidy baby, and I keep going back for just one more square. ★★★★★”

Ingredients You Need

Zucchini:
- 3 medium zucchini, grated (about 4 cups, lightly packed).
- Squeeze out extra moisture with a clean kitchen towel so the slice bakes firm, not soggy.
Eggs:
- 5 large eggs.
- Use good quality eggs if you can; they give richer flavor and color.
Flour:
- 1 cup all-purpose flour.
- Use plain flour, not self-rising, since the recipe already uses baking powder.
- Swap with a 1:1 gluten free baking blend if needed.
Baking powder:
- 2 teaspoons baking powder to help the slice puff and stay light.
Cheese:
- 1 cup shredded cheddar cheese.
- 1 cup shredded mozzarella or Colby Jack.
- Use pre-shredded cheese as a shortcut, though freshly grated melts a bit smoother.
Onion and garlic:
- 1 small onion, finely diced or grated.
- 2 cloves garlic, minced.
- Use 1 teaspoon garlic powder if you do not have fresh garlic.
Oil or melted butter:
- 1/3 cup light olive oil or neutral oil like avocado or canola.
- Use melted butter for a richer, more quiche-like flavor.
Seasonings:
- 1 teaspoon fine sea salt.
- 1/2 teaspoon black pepper.
- 1 teaspoon dried Italian herbs or dried oregano.
- Optional: pinch of red pepper flakes for a little heat.
Optional add-ins:
- 1/2 cup cooked bacon bits or diced ham.
- 1/2 cup corn kernels, peas, or finely diced bell pepper.
- 2 tablespoons chopped fresh parsley or chives.

Equipment List

9 x 13 inch baking pan or dish, lightly greased or lined with parchment.
Large mixing bowl.
Whisk and spatula.
Box grater or food processor with grating disc for the zucchini.
Clean kitchen towel or cheesecloth to squeeze zucchini.
Knife and cutting board.

Tips & Mistakes

Squeeze the zucchini very well so the slice sets nicely and does not turn watery.
Line the pan with parchment and leave a little overhang so you lift the whole Zucchini Slice Recipe out easily for clean cutting.
Whisk the eggs until smooth before you add flour so the batter stays lump free.
Do not overmix after you add flour; mix just until no dry spots show so the texture stays tender.
Spread the mixture evenly in the pan so it bakes at the same rate and does not burn at the edges.
Check for doneness with a toothpick in the center; pull it out when it comes out mostly clean so the slice stays moist.
Let the slice cool at least 10 to 15 minutes before cutting so the squares hold their shape.
Use a sharp knife and wipe the blade between cuts for neat, lunchbox friendly pieces.

How to Make Zucchini Slice Recipe

Step 1: Prep the pan and oven

Heat the oven to 350°F (175°C).
Grease a 9 x 13 inch baking pan with oil or line it with parchment paper.
Set the pan aside while you mix the batter.

Step 2: Grate and drain the zucchini

Wash the zucchini and trim the ends.
Grate the zucchini on the large holes of a box grater or in a food processor.
Place the grated zucchini in a clean kitchen towel, gather the edges, and squeeze hard over the sink until you remove as much liquid as you can.

Step 3: Mix the wet ingredients

Crack the eggs into a large mixing bowl.
Add the oil or melted butter, salt, pepper, garlic, and dried herbs.
Whisk until the mixture looks smooth and slightly frothy.

Step 4: Add flour and baking powder

Sprinkle the flour and baking powder over the egg mixture.
Whisk gently until no dry flour streaks remain.
Scrape the sides and bottom of the bowl with a spatula to catch any hidden flour.

Step 5: Fold in zucchini, cheese, and add-ins

Add the well squeezed zucchini to the bowl.
Add the shredded cheeses, onion, and any optional add-ins like bacon, corn, or herbs.
Fold everything together with a spatula until the mixture looks evenly combined.

Step 6: Fill the pan and bake

Pour the zucchini slice mixture into the prepared pan.
Spread it into an even layer and smooth the top with the spatula.
Bake for 30 to 40 minutes, until the top looks golden and a toothpick in the center comes out mostly clean.

Step 7: Cool, slice, and serve

Place the pan on a cooling rack and let the Zucchini Slice Recipe cool at least 10 to 15 minutes.
Use the parchment overhang to lift the slice out of the pan if you used it.
Cut into squares or rectangles and serve warm, at room temperature, or chilled.

Variations I've Tried

Protein packed zucchini slice: Add 1 cup diced cooked chicken sausage or turkey sausage and use extra sharp cheddar for bold flavor.
Mediterranean style: Swap mozzarella for feta, add chopped olives, sun dried tomatoes, and a little fresh oregano.
Breakfast version: Add cooked crumbled bacon, green onion, and a handful of hash brown shreds, then serve with sliced avocado.
Kid friendly mild slice: Skip onion chunks and use onion powder instead, use mild cheddar, and add a handful of corn for sweetness.
Low carb tweak: Replace half the flour with almond flour and use extra grated zucchini and cheese for a denser, more frittata like texture.

How to Serve Zucchini Slice Recipe

Serve Zucchini Slice Recipe warm with a simple green salad and some sliced tomatoes for a light lunch or dinner. Pack cold slices in lunchboxes with carrot sticks, cucumber rounds, and a little hummus. Offer it as a brunch item next to scrambled eggs, fruit salad, and toast. Cut it into small squares and serve it as a snack plate with yogurt dip or salsa.

How to store

Fridge: Cool the zucchini slice completely, then store pieces in an airtight container in the refrigerator for up to 4 days.
Freezer: Wrap individual squares in plastic or parchment, place them in a freezer bag, and freeze for up to 2 months.
Reheat in oven: Heat slices on a baking sheet at 325°F (165°C) for 10 to 15 minutes until warm through; this keeps the edges a little crisp.
Reheat in microwave: Warm one slice at a time on a microwave safe plate in 20 to 30 second bursts until heated, which works best when you feel impatient and hungry.