There is nothing quite like the comforting aroma of an Apple Slab Pie baking in the oven. If you need to feed a crowd, this stunning dessert delivers all the classic flavors of a traditional pie in a convenient, high-yield format. Every square slice reveals steaming, juicy apple filling trapped between layers of incredible pastry.
What sets this recipe apart is the forensic attention to texture and flavor. We are aiming for a highly specific result: a golden-brown, flaky pastry crust on the bottom, supporting a thick middle layer of thinly sliced, tender baked apples. As it bakes, the juices transform into a glossy cinnamon syrup that bubbles up through the crust.
Finished with small steam vents and a generous sprinkle of coarse sanding sugar, the top crust bakes to a deep golden color. When you lift that first square slice with a metal spatula, the sweet, spiced aroma is simply irresistible. Get ready to bake the ultimate fall and holiday centerpiece!
Why You’ll Love This Recipe
- Perfect for Crowds: Baked in a rimmed metal baking sheet, this pie yields beautiful, uniform square slices that are much easier to serve than traditional wedge cuts.
- Glossy Cinnamon Syrup: By combining two types of sugar with cornstarch, the apple juices thicken into a beautiful, glossy syrup that perfectly coats every thin slice of apple.
- Flaky, Golden Crust: Using ice-cold butter and an egg wash ensures the top and bottom crusts are structurally sound, deeply golden, and incredibly flaky.
- Sensory Delight: The crunch of the coarse sanding sugar provides a magnificent textural contrast to the tender baked apples inside.
Ingredients & Substitutions
All-Purpose Flour: You will need 4 cups (480g) of all-purpose flour for the dough. This provides the ideal protein content to create a sturdy yet tender double crust capable of holding the heavy apple filling.
Unsalted Butter: Use 1.5 cups (340g) of very cold unsalted butter, cut into small cubes. The cold fat creates steam pockets in the oven, which is the scientific secret to achieving that signature flaky pastry.
Ice Water: You will need about 3/4 cup (180ml) of ice water. Keeping the liquid ice-cold prevents the butter from melting while you handle the dough.
Fresh Apples: Use 4 lbs (1.8kg) of firm baking apples, such as a mix of Granny Smith and Honeycrisp. They must be thinly sliced to ensure they lay flat, cook evenly, and become perfectly tender without turning into mush.
Sugars: A blend of 3/4 cup (150g) granulated sugar and 1/2 cup (100g) packed brown sugar adds complex caramel notes. The sugar draws out the fruit juices needed for the filling.
Cornstarch: Use 1/4 cup (30g) of cornstarch. This is the invisible, crucial ingredient that activates with the simmering fruit juices to create a thick, glossy cinnamon syrup rather than a watery base.
Lemon Juice: Add 1 tbsp (15ml) of fresh lemon juice. The acidity balances the sweetness and provides the necessary pectin activation to help set the filling.
Spices & Salt: You will need 2 tsp (5g) ground cinnamon, 1/4 tsp (1g) ground nutmeg, and 1 tsp (5g) of salt divided between the crust and filling. These elevate the warm, comforting flavor profile.
Egg & Sanding Sugar: Whisk 1 large egg with 1 tbsp (15ml) milk for the egg wash, and grab 2 tbsp (30g) of coarse sanding sugar. This combination guarantees the top crust bakes to a deep golden color with a satisfying crunch.
Equipment Needed
- 15×10-inch Rimmed Metal Baking Sheet: Crucial for establishing the “slab” shape and ensuring the bottom crust conducts heat efficiently.
- Metal Spatula: The perfect tool for neatly lifting those gorgeous square slices out of the pan.
- Rolling Pin: Necessary for rolling the large sheets of dough evenly.
- Large Mixing Bowls: For tossing the apples and cutting the pastry dough.
Step-by-Step Instructions
1. Prepare the Flaky Pastry Dough
In a large bowl, whisk together the 4 cups (480g) of flour and 3/4 tsp (4g) of salt. Drop in the 1.5 cups (340g) of cold, cubed butter.
Using a pastry blender or your fingers, cut the butter into the flour until the mixture resembles coarse crumbs with some pea-sized pieces remaining. Sprinkle the 3/4 cup (180ml) of ice water over the top, one tablespoon at a time, tossing gently with a fork.
Stop adding water as soon as the dough holds together when squeezed. Divide the dough in half, shape each into a flat rectangle, wrap tightly in plastic wrap, and chill in the refrigerator for at least 1 hour.
2. Create the Apple Filling
While the dough chills, peel, core, and thinly slice the 4 lbs (1.8kg) of apples. Aim for slices about 1/8 to 1/4-inch thick so they layer beautifully.
In a massive bowl, toss the sliced apples with 1 tbsp (15ml) lemon juice. Sprinkle the 3/4 cup (150g) white sugar, 1/2 cup (100g) brown sugar, 1/4 cup (30g) cornstarch, 2 tsp (5g) cinnamon, 1/4 tsp (1g) nutmeg, and the remaining 1/4 tsp (1g) salt over the fruit.
Toss everything vigorously until the apples are fully coated. You will notice the apples beginning to release their juices, mixing with the cornstarch to form the base of your glossy cinnamon syrup.
3. Roll the Bottom Crust
Preheat your oven to 375°F (190°C). On a lightly floured surface, roll one of the chilled dough rectangles into an 18×13-inch rectangle.
Carefully transfer the dough to your 15×10-inch rimmed metal baking sheet. Gently press the pastry into the corners and up the sides of the pan, allowing any excess to hang over the edges.
Spread the prepared apple filling evenly over the bottom crust. Be sure to pour any of the accumulated glossy syrup from the bowl directly over the tender apples.
4. Assemble and Vent the Top Crust
Roll the second chilled dough rectangle into a 16×11-inch rectangle. Drape it delicately over the apple filling.
Fold the overhanging bottom crust over the top crust, pinching the edges together to seal the pie tightly. Crimp the edges with your fingers or a fork.
Using a sharp paring knife, cut several small steam vents across the top crust. This crucial step allows the steaming, juicy apple filling to release moisture, preventing a soggy pastry.
5. Egg Wash and Bake
In a small bowl, whisk the 1 large egg with 1 tbsp (15ml) milk. Use a pastry brush to apply a light, even coating of this egg wash all over the top crust.
Generously sprinkle the 2 tbsp (30g) of coarse sanding sugar over the egg-washed dough. Transfer the baking sheet to the center rack of the preheated oven.
Bake for 45 to 55 minutes. You will know it is done when the crust is baked to a deep golden color and you can see the thick, glossy cinnamon syrup bubbling up through the steam vents.
Allow the slab pie to cool on a wire rack for at least 2 hours before slicing into squares with a metal spatula.
Expert Tips for Success
- Keep the Butter Cold: If your kitchen is warm, place the bowl of flour and butter in the freezer for 10 minutes before adding the ice water. Cold fat equals a flaky crust.
- Do Not Skip the Cornstarch: Thinly sliced apples release a lot of water. The cornstarch is mandatory for transforming that water into a rich, glossy cinnamon syrup.
- Cut Consistent Slices: Ensuring your apples are sliced to a uniform thickness means they will bake evenly, resulting in a perfectly tender middle layer.
- Let it Rest: Slicing the pie while it is still piping hot will cause the juices to run out. Allowing it to cool lets the steaming, juicy apple filling set up properly.
Storage & Reheating/Freezing
Room Temperature: You can store leftover Apple Slab Pie lightly covered at room temperature for up to 2 days.
Refrigeration: For longer storage, keep the pie in an airtight container in the refrigerator for up to 5 days. The cold environment helps preserve the tender baked apples.
Freezing: You can freeze baked slices by wrapping them tightly in plastic wrap and aluminum foil for up to 3 months. Thaw overnight in the fridge.
Reheating: To restore the flaky pastry crust, reheat individual square slices in a 350°F (175°C) oven for 10-15 minutes until warmed through.
What to Serve With This
Apple Slab Pie is the ultimate dessert for gatherings, potlucks, and large family meals. Because it feeds a crowd, it pairs beautifully with large-scale savory dinners and festive spreads. If you are planning an epic menu, try building your meal around some of our favorite main courses. Serve up a rich and creamy indian-butter-chicken, a decadent steak-au-poivre-recipe, or an intensely flavorful authentic-jamaican-oxtail.
If you prefer comforting casseroles and pasta bakes, start the night with a massive million-dollar-italian-lasagna, a cheesy crockpot-pierogi-casserole, or a hearty cheesy-hamburger-potato-casserole. For an easy weeknight feast before digging into this pie, consider our chicken-sausage-sheet-pan-dinner, crockpot-steak-and-potatoes, or the ever-popular keto-chicken-alfredo-broccoli-bake.
Looking for cozy soups to pair with your fall apple baking? A warm bowl of creamy-chicken-parmesan-soup, tuscan-sausage-and-potato-soup, or cheeseburger-macaroni-soup is the perfect precursor to a sweet, spiced dessert. Add a side of sourdough-discard-focaccia or cheesy-sloppy-joe-garlic-bread for dipping!
If you’re hosting an appetizer-heavy party, set out slices of this slab pie alongside savory bites like bacon-jalapeno-popper-egg-rolls, buffalo-chicken-sliders, sweet-potato-appetizer-bites, and a fresh crunchy-asian-cabbage-salad or homemade-ham-salad. For a fancier spread, consider serving apple-goat-cheese-croissant and shrimp-and-crab-biscuit-melts.
Finally, if you are building an epic dessert table, this Apple Slab Pie belongs next to other magnificent sweets. Pair it with our caramel-brownie-cheesecake, a classic brown-sugar-caramel-pound-cake, beautiful pink-sugar-cookie-bars, or an elegant earl-grey-panna-cotta. For pie lovers, you can also offer our traditional homemade-apple-pie-recipe or pecan-pie-cheesecake-bars for maximum variety!
Frequently Asked Questions
Yes! You can bake the pie completely, let it cool, and store it at room temperature for up to 2 days. The pastry dough can also be made up to 3 days in advance and kept in the refrigerator.
Yes, but you will need a larger quantity. A standard 15×10-inch slab pie requires about 3 to 4 standard store-bought pie crusts rolled and pressed together to adequately cover the bottom and top of the pan.
A mix of sweet and tart baking apples yields the best flavor and texture. Granny Smith, Honeycrisp, Braeburn, and Pink Lady are excellent choices because they hold their shape during baking.
A traditional slab pie is baked in a 15×10-inch rimmed metal baking sheet (also known as a jelly roll pan). This allows the heat to distribute evenly, ensuring a crispy bottom crust and allowing the apples to cook through perfectly.
Watery filling happens if you omit a thickener or slice the apples too thick so they release water slowly. This recipe uses cornstarch and a specific resting time to ensure the juices transform into a thick, glossy cinnamon syrup.
Closing & Subscribe
This Apple Slab Pie is guaranteed to become a family favorite. With its golden-brown flaky crust, glossy cinnamon syrup, and tender baked apples, it hits every sensory note perfectly. The coarse sanding sugar adds that final, professional touch.
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Recipe Card
The Best Apple Slab Pie Recipe
Ingredients
Equipment
Instructions
- In a large bowl, whisk together the 4 cups (480g) of flour and 3/4 tsp (4g) of salt. Drop in the 1.5 cups (340g) of cold, cubed butter.
- Using a pastry blender or your fingers, cut the butter into the flour until the mixture resembles coarse crumbs with some pea-sized pieces remaining. Sprinkle the 3/4 cup (180ml) of ice water over the top, one tablespoon at a time, tossing gently with a fork.
- Stop adding water as soon as the dough holds together when squeezed. Divide the dough in half, shape each into a flat rectangle, wrap tightly in plastic wrap, and chill in the refrigerator for at least 1 hour.
- While the dough chills, peel, core, and thinly slice the 4 lbs (1.8kg) of apples. Aim for slices about 1/8 to 1/4-inch thick so they layer beautifully.
- In a massive bowl, toss the sliced apples with 1 tbsp (15ml) lemon juice. Sprinkle the 3/4 cup (150g) white sugar, 1/2 cup (100g) brown sugar, 1/4 cup (30g) cornstarch, 2 tsp (5g) cinnamon, 1/4 tsp (1g) nutmeg, and the remaining 1/4 tsp (1g) salt over the fruit.
- Toss everything vigorously until the apples are fully coated. You will notice the apples beginning to release their juices, mixing with the cornstarch to form the base of your glossy cinnamon syrup.
- Preheat your oven to 375°F (190°C). On a lightly floured surface, roll one of the chilled dough rectangles into an 18x13-inch rectangle.
- Carefully transfer the dough to your 15x10-inch rimmed metal baking sheet. Gently press the pastry into the corners and up the sides of the pan. Spread the prepared apple filling evenly over the bottom crust. Be sure to pour any of the accumulated glossy syrup from the bowl directly over the tender apples.
- Roll the second chilled dough rectangle into a 16x11-inch rectangle. Drape it delicately over the apple filling. Fold the overhanging bottom crust over the top crust, pinching the edges together to seal. Crimp the edges. Using a sharp paring knife, cut several small steam vents across the top crust.
- In a small bowl, whisk the 1 large egg with 1 tbsp (15ml) milk. Use a pastry brush to apply a light, even coating of this egg wash all over the top crust. Generously sprinkle the 2 tbsp (30g) of coarse sanding sugar over the egg-washed dough.
- Transfer the baking sheet to the center rack of the preheated oven. Bake for 45 to 55 minutes until the crust is baked to a deep golden color and the thick, glossy cinnamon syrup is bubbling up through the steam vents.
- Allow the slab pie to cool on a wire rack for at least 2 hours before slicing into squares with a metal spatula.
Notes
Letting the pie cool before slicing allows the cornstarch and fruit juices to set into a thick, glossy syrup.
