This spinach and feta puff pastry slab pie is one of those recipes that looks like you worked way harder than you actually did. Flaky golden puff pastry, a savory spinach and cheese filling, and a simple sheet pan method make it perfect for brunch, lunch, appetizers, or an easy vegetarian side dish.

I originally made this because I love recipes that feel special without requiring homemade dough. Puff pastry does all the heavy lifting here. Once it bakes, it turns beautifully crisp and flaky, while the spinach, feta, mozzarella, and dill filling stays soft and savory inside.

It is basically a shortcut spinach pie, but instead of layering phyllo, you use puff pastry sheets and bake everything as one big slab pie.

Why You’ll Love This Spinach and Feta Puff Pastry

This spinach and feta puff pastry slab pie is easy, cozy, and really versatile. You can serve it warm from the oven, slice it into smaller squares for an appetizer, or pair it with a salad for a simple lunch or dinner.

It is also a great recipe when you want something homemade but do not want to make dough from scratch. Frozen puff pastry is one of my favorite shortcut ingredients because it bakes up buttery, golden, and flaky with very little effort.

This recipe is especially good for:

• Brunch
• Lunch boxes
• Appetizers
• Vegetarian dinners
• Potlucks
• Holiday side dishes
• Light dinners with soup or salad

What Is a Puff Pastry Slab Pie?

A slab pie is basically a pie baked in a sheet pan instead of a round pie dish. For this savory version, one sheet of puff pastry goes on the bottom, the spinach and feta filling gets spread over the top, and a second sheet of puff pastry covers everything.

The edges are pressed together, the top is brushed with egg wash, and the whole thing bakes until golden brown and flaky.

It is much easier than individual hand pies and easier than working with phyllo dough, which makes it a great shortcut spinach pie recipe.

Ingredients

Puff Pastry

You will need one package of puff pastry dough, thawed. Most packages come with two sheets, which is exactly what you need: one for the bottom and one for the top.

The best way to thaw puff pastry is overnight in the fridge. If you are short on time, you can let it sit at room temperature until it is soft enough to unfold, but make sure it does not get too warm or sticky.

Frozen Chopped Spinach

Frozen chopped spinach makes this recipe quick and easy. The most important step is to thaw it and squeeze out as much liquid as possible. If the spinach is too wet, the puff pastry can turn soggy.

Feta Cheese

Feta adds saltiness, tang, and that classic spinach pie flavor. Crumbled feta works best.

Mozzarella Cheese

Mozzarella helps bind the filling and gives it a softer, cheesier texture. It balances the sharper feta.

Fresh Dill

Fresh dill adds brightness and makes the filling taste fresh. If you love dill, you can add a little extra.

Eggs

One egg goes into the spinach filling to help hold everything together. The second egg is used for the egg wash so the puff pastry bakes up glossy and golden.

Salt

Add salt to taste, but remember that feta is already salty, so start with a small amount.

How to Make Spinach and Feta Puff Pastry Slab Pie

1. Thaw the puff pastry

Thaw the puff pastry according to the package directions. I prefer thawing it in the fridge overnight because it keeps the pastry cold and easier to work with.

If you thaw it on the counter, unfold it slowly as it softens so it does not crack.

2. Prepare the spinach filling

Thaw the frozen chopped spinach and squeeze out as much liquid as possible. This step is important. You want the spinach to be as dry as you can get it so the pastry bakes properly.

Add the spinach to a bowl with feta, mozzarella, fresh dill, salt, and one egg. Mix until everything is evenly combined.

3. Roll out the first puff pastry sheet

Roll out one sheet of puff pastry on a lightly floured surface or a sheet of parchment paper. You want it large enough to fit your sheet pan.

Transfer it to a 13×18-inch sheet pan and gently press it into place. If the edges are slightly larger than the pan, that is fine. You can trim them later.

4. Add the spinach and feta filling

Spoon the spinach and feta mixture over the puff pastry and spread it into an even layer. Try to keep the filling away from the very edges so you can seal the top and bottom pastry together.

5. Add the top puff pastry sheet

Roll out the second sheet of puff pastry and carefully place it over the filling. Trim any extra pastry from the sides.

Use a fork to press the edges together all the way around. This seals the slab pie and gives the edges that classic crimped look.

6. Brush with egg wash

Whisk the second egg with a splash of water to make an egg wash. Brush it over the top of the puff pastry.

This helps the pastry bake up golden and shiny.

7. Bake until golden

Bake at 400°F until the puff pastry is puffed, flaky, and lightly golden brown. This usually takes about 30 to 35 minutes.

Let the slab pie cool for a few minutes before slicing. This helps the filling set and makes it easier to cut clean pieces.

Pro Tips for the Best Spinach and Feta Puff Pastry

Squeeze the spinach really well

This is the most important tip. Wet spinach can make the bottom pastry soggy. After thawing, squeeze the spinach with your hands, a clean kitchen towel, or cheesecloth until most of the liquid is gone.

Keep the puff pastry cold

Puff pastry works best when it is cold but flexible. If it gets too warm, it can become sticky and harder to handle. If that happens, place it back in the fridge for a few minutes before continuing.

Do not overfill the edges

Leave a small border around the filling so the top and bottom pastry sheets can seal properly.

Let it cool before slicing

It is tempting to cut into it immediately, but letting it rest for a few minutes makes neater slices and keeps the filling from spilling out.

Add more herbs if you like

Dill works beautifully with spinach and feta, but you can also add parsley, scallions, or a little black pepper.

What to Serve with Spinach and Feta Puff Pastry

This spinach and feta puff pastry slab pie is filling enough on its own, but it also pairs well with simple sides.

Serve it with:

• A cucumber tomato salad
• Greek salad
• Lentil soup
• Tomato soup
• Roasted vegetables
• Yogurt cucumber sauce
• Olives and pickles
• Fresh fruit for brunch

[Insert current photo: close-up slice showing spinach and feta filling]

How to Store Leftovers

Store leftover spinach and feta puff pastry in an airtight container in the refrigerator for up to 3 days.

The pastry will soften slightly in the fridge, but it reheats well.

How to Reheat Puff Pastry

For the best texture, reheat leftovers in the oven or air fryer until warmed through and crisp again.

Avoid microwaving if possible because the puff pastry can become soft instead of flaky.

Can I Make This Ahead?

Yes. You can prepare the filling ahead of time and store it in the refrigerator until you are ready to assemble the slab pie.

You can also assemble the slab pie a little ahead of time and keep it chilled until baking. For best results, bake it fresh so the puff pastry stays flaky.

FAQ

Can I use fresh spinach instead of frozen spinach?

Yes, but you will need to cook it down first. Fresh spinach releases a lot of liquid, so sauté it until wilted, let it cool, and squeeze out any extra moisture before mixing it with the cheese.

Do I have to use feta?

Feta gives this recipe its classic salty flavor, but you can adjust the cheese if needed. A mix of feta and mozzarella gives the filling flavor and softness.

Why is my puff pastry soggy?

The most common reason is too much moisture in the spinach filling. Make sure the spinach is thawed and squeezed very dry before mixing it with the cheese and egg.

Can I serve this cold?

Yes. It tastes best warm or at room temperature, but leftovers can also be eaten cold from the fridge.

Can I freeze spinach and feta puff pastry?

You can freeze it after baking, but the texture is best fresh. To reheat, bake from frozen or thawed until hot and crisp.

You May Also Like

• For another savory puff pastry recipe, try my Middle Eastern Meat Pies.
• If you need an easy appetizer, make my Bacon and Puff Pastry Wrapped Asparagus.
• For a sweet puff pastry idea, check out my Apple Turnovers.
• You can also try my Honey Apple Cinnamon Tarts for another simple pastry dessert.