Delicious Apple Slab Pie

The first time I brought a slab pie to a neighborhood gathering, I watched peoples eyebrows raise at the rectangular shape. By the end of the night, the pan was empty and three different people had asked for the recipe. Something about those rustic squares just makes everyone grab an extra piece.

Last Thanksgiving, my sister accidentally dropped her traditional pumpkin pie on the floor. We laughed, then I remembered I had a slab pie in the freezer. Emergency averted, and honestly, everyone preferred the apple version anyway.

Ingredients

• All-purpose flour: The foundation for a tender, flaky crust that holds up to juicy fruit filling
• Cold unsalted butter: Keeping it icy cold creates those essential flaky layers as it melts in the oven
• Granny Smith and Honeycrisp apples: A mix gives you the perfect balance of tart and sweet, with texture that holds its shape
• Granulated and brown sugar: The combination creates depth of flavor and helps thicken the apple juices
• Cornstarch: Crucial for binding the fruit juices so you get clean slices instead of a soggy mess
• Egg wash: That golden sheen isnt just pretty, it helps the crust bake evenly and stay crisp

Instructions

Prepare your workspace and oven:

Preheat to 400°F and line a 10x15-inch rimmed baking sheet with parchment paper. Do not skip the rimmed part or the buttery juices will overflow onto your oven floor.

Make the crust dough:

Combine flour, sugar, and salt in a large bowl. Cut in cold butter until the mixture looks like coarse crumbs with some pea-sized pieces remaining. Sprinkle in ice water gradually, tossing gently just until the dough holds together when squeezed.

Divide and chill briefly:

Split dough into two unequal portions, about two-thirds and one-third. Form into discs, wrap, and refrigerate for 15 minutes while you prepare the filling. This step prevents the crust from shrinking during baking.

Prepare the apple filling:

In a large bowl, toss sliced apples with both sugars, cinnamon, nutmeg, salt, cornstarch, and lemon juice until every piece is evenly coated. Let it sit for 5 minutes to draw out some juices before assembling.

Roll out the bottom crust:

On a floured surface, roll the larger dough portion into a rectangle that extends beyond your pan. Carefully transfer it to the prepared baking sheet, pressing it gently into the corners and up the sides. Do not worry if it looks imperfect, rustic is part of the charm.

Add the filling:

Arrange the apple mixture evenly over the crust, mounding it slightly higher in the center since it will settle during baking. Pour any accumulated juices from the bowl over the apples.

Top and seal the pie:

Roll the remaining dough to match the pan dimensions. Place it over the apples, trim excess dough, and pinch the edges together to seal. Cut five or six small slits in the top crust for steam to escape.

Add the finishing touches:

Whisk egg with milk and brush the entire top crust with the mixture. Sprinkle with coarse sugar for that bakery sparkle. The wash gives the crust its beautiful golden color and helps the sugar stick.

Bake to perfection:

Bake for 35 to 40 minutes until deeply golden and the filling is bubbling vigorously through the vents. If the edges brown too quickly, cover them with foil for the last 10 minutes.

Cool completely before slicing:

Let the slab pie rest for at least 30 minutes before cutting. This wait time is agony but essential for clean, neat squares that hold their shape on the plate.

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My daughter now requests this for her birthday instead of cake. The way she reaches for the corner pieces first, knowing they have the most crispy edge, reminds me of watching my own brother do the same thing at our family table growing up.

Choosing the Right Apples

The combination of Granny Smith and Honeycrisp creates the perfect texture and flavor balance. Granny Smith holds its shape beautifully while providing tartness, and Honeycrisp adds sweetness and a tender bite. Avoid soft varieties like Red Delicious or Gala, which will turn to applesauce mush in the oven.

Make Ahead Strategy

You can prepare the entire slab pie up to a day ahead and refrigerate it unbaked. Add 5 to 10 minutes to the baking time if baking cold from the refrigerator. The crust actually benefits from the extra chilling time, resulting in even flakier layers.

Storage and Serving Tips

Leftovers (if you are lucky enough to have them) keep well at room temperature for up to two days, loosely covered with foil. The crust will soften slightly but the flavors continue to meld and deepen.

• Reheat individual squares in a 350°F oven for 10 minutes to recrisp the crust
• Serve with vanilla ice cream while still slightly warm for the ultimate comfort dessert
• For a dinner party, bake it in the morning and serve at room temperature with whipped cream

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There is something deeply satisfying about serving a homemade slab pie, watching people reach for seconds without hesitation. It is the kind of dessert that turns an ordinary Tuesday into something worth celebrating.

Recipe FAQ

→ What type of apples work best?

Granny Smith and Honeycrisp apples are excellent choices because they hold their shape during baking. You can also use a mix of varieties for more complex flavor.

→ Can I make this ahead?

Yes, you can prepare the filling and crust a day in advance. Store them separately in the refrigerator, then assemble and bake when ready to serve.

→ How should I store leftovers?

Cover the cooled slab pie tightly with foil or plastic wrap and store at room temperature for up to 2 days, or refrigerate for up to 4 days.

→ Can I freeze this?

You can freeze the unbaked assembled pie for up to 3 months. Thaw overnight in the refrigerator before baking as directed.

→ Why use a slab pan instead of a round pie dish?

The rectangular shape yields more servings and creates a better crust-to-filling ratio. It's also easier to transport and slice for parties.

→ How do I know when it's done?

The crust should be deep golden brown and you should see the filling bubbling actively through the steam vents. If the crust browns too quickly, cover with foil.