Delicious Apple Slab Pie

Last Thanksgiving, my tiny apartment kitchen became command central for feeding fifteen people. A regular 9-inch pie would have been laughable, so I embraced the slab pie philosophy—bigger pan, more servings, less stress about perfect presentation.

My grandmother always said pie tastes better when you do not have to ration slices. She was the kind of cook who made oversized everything, claiming leftovers were just ingredients for tomorrow is happiness.

Ingredients

• All-purpose flour: The backbone of structure, though I have sneaked in some whole wheat for character
• Cold unsalted butter: Keep it cold, seriously—warm butter makes me sad, tough crust
• Granny Smith and Honeycrisp apples: One tart, one sweet, together they are the dynamic duo of pie filling
• Cornstarch: The unsung hero that keeps your bottom crust from becoming a soggy disappointment
• Egg wash: That golden finish makes people think you are secretly a pastry chef

Instructions

Get your station ready:

Crank that oven to 400°F and parchment-line your largest rimmed baking sheet

Build the foundation:

Mix flour, sugar, and salt, then cut in cold butter until the mixture looks like sandy crumbs. Drizzle in ice water gradually until the dough actually holds together when you squeeze it

Roll out the bottom:

Use the larger dough portion on a floured surface. Roll it until it covers your pan is bottom and climbs up the sides, then transfer it gently, pressing into corners

Prepare the apple mountain:

Toss those sliced apples with both sugars, cinnamon, nutmeg, salt, cornstarch, and lemon juice until every piece is coated and looking like autumn in a bowl

Layer and crown:

Pile apples onto the bottom crust, then roll out the remaining dough and drape it over the top. Trim, seal edges like you mean it, and slash a few vents so the steam can escape

Give it some shine:

Whisk egg with milk and brush the entire top, then shower with coarse sugar because sparkly crust is happy crust

Bake until golden:

Slide into the oven for 35 to 40 minutes. You are looking for deep golden brown and active bubbling through those vents

Patience pays off:

Let it cool for at least 30 minutes. I know, the smell is torture, but slicing warm pie results in a runaway filling situation

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That first slab pie Thanksgiving, my cousin asked for the recipe before she had even finished her first square. Nothing makes you feel like you nailed adulthood quite than requests for your dessert.

Making It Ahead

I have assembled the entire thing, wrapped it tightly, and refrigerated overnight. Bake it straight from the fridge, just add a few minutes to the timer.

Serving Suggestions

Warm slices with vanilla ice cream are nonnegotiable at my house. Something about the cold cream melting into hot spiced apples creates pure magic.

Storage & Reheating

This actually keeps beautifully at room temperature for up to two days, covered loosely. After that, the refrigerator is your friend.

• Reheat individual squares for about 20 seconds in the microwave
• A quick toast in the oven brings back the crisp crust beautifully
• Freeze fully cooled, wrapped well, for up to three months

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There is something about slab pie that feels like a warm hug. Maybe it is the nostalgia, or maybe it is just that dessert tastes better when there is plenty to go around.

Recipe Help & Support

→ What apples work best?

Granny Smith and Honeycrisp apples deliver excellent results. The tartness balances sweetness while holding texture during baking. Mix varieties for complex flavor.

→ Can I make this ahead?

Prepare the dough and filling separately one day in advance. Store wrapped dough in refrigeration and keep filling chilled. Assemble and bake when ready to serve.

→ How do I store leftovers?

Cover cooled portions with plastic wrap or place in an airtight container. Keep at room temperature for two days or refrigerate for up to five days. Reheat gently before serving.

→ Why use a slab pan?

The rectangular sheet pan yields more surface area for crispy edges. This shape serves twelve to sixteen people efficiently and slices into uniform squares for easy portioning.

→ Can I freeze it?

Freeze unbaked assembled slab pie wrapped tightly for up to three months. Thaw overnight in refrigeration before baking. Already baked portions freeze well for two months.

→ What makes the crust flaky?

Cold butter creates pockets of steam during baking, forming light layers. Keep ingredients chilled and handle dough minimally. The ice water brings dough together without developing gluten.