Apple Slab Pie with Crumble Topping
This apple slab pie with a buttery crumble topping feeds a crowd with flaky pie crust, tender spiced apples, and a sweet crunchy finish. An easy fall dessert everyone will ask for twice.
The Easiest Way to Feed a Crowd This Fall
If you love the flavor of a classic apple pie but dread the fuss of a lattice top, this apple slab pie with crumble topping is about to become your new favorite fall pie recipe. It takes everything you love about apple and pie crust recipes and stretches it into a big, shareable sheet pan dessert with a buttery, crunchy topping instead of a second crust. Think of it as an apple crisp with pie crust underneath, giving you the best of both worlds in every single bite.
This is genuinely one of the easiest apple pie crust recipes you'll ever make. There's no lattice weaving, no crimping fuss, and no worrying about a soggy bottom. Just roll, fill, crumble, and bake.
Before we get cooking, the right tools and ingredients make a real difference here. A sturdy rimmed baking sheet keeps the juices from spilling into your oven, and a good pastry cutter makes quick work of that buttery crumble topping. These are the products that genuinely help this recipe shine:
Why This Recipe With Pie Filling Works So Well
Most recipes with pie filling call for one apple and one crust. This one flips the ratio in your favor. Because the pie is baked in a large rectangular pan, you get more crust-to-filling surface area, which means more of that golden, flaky edge in every square. It's essentially a one crust apple pie stretched wide, topped generously with a brown sugar oat crumble instead of a second layer of dough.
Using two refrigerated pie crusts pressed together as your base keeps things simple, but if you have a favorite homemade dough, feel free to use that instead. Either way, you'll end up with one of the easiest fall pies recipes easy enough for a weeknight, yet impressive enough for a holiday dessert table.
Chef's Tip: Slice your apples about a quarter inch thick and as evenly as possible. Uneven slices mean some pieces turn mushy while others stay firm, and consistency is the secret to that perfect apple tart texture in every bite.
Choosing the Right Apples
For the best texture, reach for firm, tart apples that hold their shape during baking. Granny Smith apples are the classic choice for homemade apple desserts like this one, offering a bright tartness that balances the sweet crumble topping beautifully. Honeycrisp apples work wonderfully too, adding natural sweetness and a satisfying crunch. Feel free to mix varieties for a more layered, complex flavor, which is a trick professional bakers use in apple tarts with pie crust to keep every bite interesting.
Avoid softer apples like Red Delicious or McIntosh, since they tend to break down too much and can leave your filling watery rather than lusciously tender.
Building the Crumble Topping
The crumble topping is what really sets this apart from a traditional double crust pie. Cold butter is key here. Cutting cold, cubed butter into the flour, brown sugar, and oats creates those irresistible little clusters that turn golden and slightly crisp in the oven. If your kitchen runs warm, pop the butter in the freezer for ten minutes before you start.
This topping also happens to make this recipe far more forgiving than a traditional pie crust top. There's no worrying about sealing edges or achieving a perfect lattice pattern. Just sprinkle it on generously, right to the edges, so every slice gets its share of that crunchy, cinnamon-kissed topping.
Ready to make it? Here is the full step-by-step recipe:
Apple Slab Pie with Crumble Topping
This apple slab pie with a buttery crumble topping feeds a crowd with flaky pie crust, tender spiced apples, and a sweet crunchy finish. An easy fall dessert everyone will ask for twice.
Ingredients
- 2 refrigerated pie crusts, store-bought or homemade, one 14 oz box
- 8 cups apples, peeled, cored, and thinly sliced, about 8 medium apples such as Granny Smith or Honeycrisp
- 3/4 cup granulated sugar, for the apple filling
- 1/4 cup all-purpose flour, to thicken the filling
- 1 1/2 tsp ground cinnamon
- 1/4 tsp ground nutmeg
- 1 tbsp lemon juice, freshly squeezed
- 1/2 cup unsalted butter, cold, cubed, for the crumble topping
- 1 cup all-purpose flour, for the crumble topping
- 1/2 cup brown sugar, packed, for the crumble topping
- 1/2 cup rolled oats, old-fashioned, for the crumble topping
- 1 large egg, beaten, for egg wash
- 1 cup powdered sugar, for optional glaze
- 2 tbsp milk, for optional glaze
Instruction
Preheat the oven to 375 degrees F (190 degrees C) and line a 15x10 inch rimmed baking sheet with parchment paper.
Unroll both pie crusts and press them together, patching seams with your fingers, to form one large rectangle that fits the bottom of the baking sheet with a slight overhang on the sides.
In a large bowl, toss the sliced apples with granulated sugar, flour, cinnamon, nutmeg, and lemon juice until evenly coated.
Spread the apple mixture evenly over the crust in the pan.
In a medium bowl, combine the flour, brown sugar, and oats for the crumble topping, then cut in the cold butter with a fork or your fingers until the mixture resembles coarse crumbs.
Sprinkle the crumble topping evenly over the apples, covering the filling completely.
Brush the exposed edges of the crust with the beaten egg for a golden finish.
Bake for 40 to 45 minutes, until the topping is golden brown and the apples are tender when pierced with a knife.
Let the slab pie cool on the baking sheet for at least 30 minutes before slicing.
Whisk together powdered sugar and milk until smooth, then drizzle over the cooled pie before serving, if desired.
Equipment
- 15x10 inch rimmed baking sheet
- Parchment paper
- Large mixing bowl
- Medium mixing bowl
- Pastry cutter or fork
- Whisk
Notes
Serving and Storing Your Slab Pie
Let the pie cool for at least thirty minutes before slicing so the filling has time to set. Cutting too early will give you a beautiful but runny puddle instead of clean, structured squares. Once cooled, you can drizzle it with a simple powdered sugar glaze for extra sweetness and shine, or serve it plain with a scoop of vanilla ice cream melting into the warm crumble.
This dessert stores beautifully, which makes it ideal for holiday gatherings or potlucks where you need something that travels well and tastes just as good the next day. Simply cover the pan tightly and keep it at room temperature for up to two days, or refrigerate for longer freshness.
A Few Easy Variations
- Swap half the apples for pears for a mixed fruit slab pie.
- Add a handful of chopped pecans or walnuts to the crumble for extra crunch.
- Stir a tablespoon of caramel sauce into the apple filling before topping for a caramel apple twist.
However you serve it, this apple slab pie is proof that easy apple pie crust recipes don't have to sacrifice flavor or that classic homemade charm. It's rustic, generous, and exactly the kind of dessert that disappears fast at any fall gathering.
