Delicious Apple Slab Pie

The first time I made slab pie, I was hosting Thanksgiving for twelve people and realized too late that my regular pie dishes wouldn't feed everyone. A rectangular baking sheet saved the day, and honestly, I've never looked back. There's something so satisfying about those neat little squares, each one with perfectly proportioned crust and filling. My grandmother would have appreciated the practicality, even if she was loyal to her round pie plates.

Last autumn, my daughter helped me peel and slice what felt like a mountain of apples while rain drummed against the kitchen window. We were making this for a school potluck, and she kept sneaking apple slices when she thought I wasn't looking. The whole house smelled like cinnamon and sugar, and I knew this pie would be the kind of recipe that gets requested again and again.

Ingredients

• 3 1/2 cups all-purpose flour: The foundation of a sturdy, flaky crust that won't sag under all those apples
• 1 tablespoon granulated sugar: Just a touch of sweetness in the dough to balance the salt
• 1 1/2 teaspoons salt: Essential for flavor and strengthening the gluten structure
• 1 1/2 cups cold unsalted butter: Cold butter creates those magical flaky layers as it melts in the oven
• 1/2 cup ice water: The minimum amount needed to bring the dough together without making it tough
• 8 medium apples: Granny Smith holds its shape beautifully, while Honeycrisp adds sweetness
• 2/3 cup granulated sugar and 1/3 cup light brown sugar: The combination gives you sweetness and depth
• 1 1/2 teaspoons cinnamon and 1/4 teaspoon nutmeg: Classic warm spices that make everything taste like fall
• 3 tablespoons cornstarch: This thickens all those apple juices so you don't end up with a soggy bottom
• 1 egg and 1 tablespoon milk: The secret to that gorgeous, golden finish that makes everyone want a slice

Instructions

Preheat and prepare your pan:

Get your oven to 400°F and line a 10x15-inch rimmed baking sheet with parchment paper

Make the crust dough:

Mix flour, sugar, and salt in a large bowl, then cut in cold butter until you have coarse crumbs. Sprinkle in ice water gradually, tossing with a fork until the dough just holds together when squeezed

Divide and chill the dough:

Split dough into two pieces, making one slightly larger for the bottom crust

Roll out the bottom crust:

On a floured surface, roll the larger piece until it's big enough to cover the bottom and sides of your pan. Carefully lift it in and press into the corners

Prepare the apple filling:

In a large bowl, toss sliced apples with both sugars, cinnamon, nutmeg, salt, cornstarch, and lemon juice until everything's evenly coated

Fill the crust:

Pour those spiced apples over the bottom crust, spreading them into an even layer

Top and seal:

Roll out the remaining dough and place it over the apples. Trim the edges, pinch to seal, and cut a few steam vents in the top

Add the golden finish:

Whisk egg with milk and brush it all over the top crust, then sprinkle with coarse sugar if you want that extra sparkle

Bake to perfection:

Bake for 35 to 40 minutes until deeply golden and the filling bubbles through the vents

Patience is key:

Let it cool for at least 30 minutes before cutting into squares

Save

This recipe has become my go-to for church suppers and family reunions because it serves so many people without any fuss. Last Christmas, my brother actually asked if he could take home the leftovers, which is basically the highest compliment he could possibly pay.

Choosing Your Apples

I've learned through many batches that mixing apple varieties gives you the best of both worlds. Tart apples hold their shape during baking, while sweeter ones break down slightly into that lovely saucy consistency between slices. A half-and-half mix of Granny Smith and Honeycrisp has become my standard, butBraeburn or Jonagold work beautifully too.

Rolling Out Large Dough

Rolling dough to fit a rectangular pan feels different than the usual circular pies, and it took me a few tries to get comfortable with it. Work from the center outward and rotate your dough frequently to keep it even. If it starts to feel too soft or sticky, pop it back in the refrigerator for 10 minutes. The dough should feel cool and slightly firm when you lift it into the pan.

Serving and Storage

Slab pie cuts beautifully into neat squares that are perfect for buffet lines or casual gatherings. Serve it warm with vanilla ice cream, or let it cool completely for easier packing and transport. The leftovers, if you have any, keep remarkably well at room temperature for a day or refrigerated for up to three days.

• Run your knife under hot water between cuts for the cleanest slices
• The crust actually gets better after a day as it softens slightly
• Reheat individual squares in the oven at 350°F for about 10 minutes

Save

There's something deeply satisfying about a recipe that feeds a crowd so beautifully. Every time I pull this golden slab from the oven, I'm reminded why baking for people is one of life's simple pleasures.

Common Questions

→ What makes slab pie different from regular pie?

Slab pie is baked in a rectangular rimmed baking sheet instead of a round pie pan. This shape yields more servings and creates thinner, crispier layers of crust and filling.

→ Can I use different apple varieties?

Absolutely. Mixing Granny Smith with Honeycrisp or Braeburn creates a balance of tart and sweet. You can also substitute half the apples with pears for variety.

→ How should I store leftover apple slab pie?

Keep covered at room temperature for up to 2 days. For longer storage, refrigerate for up to 5 days. Reheat individual squares in a 350°F oven for 10 minutes to restore crispness.

→ Can I make the dough ahead of time?

Yes. Prepare the dough, wrap tightly in plastic, and refrigerate for up to 2 days or freeze for up to 3 months. Thaw overnight in the refrigerator before rolling out.

→ Why is my filling runny?

The filling needs time to set as it cools. Let the slab pie rest for at least 30 minutes before slicing. If consistently runny, try increasing cornstarch to 4 tablespoons next time.