Pumpkin Slab Pie: Easy Recipe That Feeds a Crowd

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This pumpkin slab pie delivers all the cozy spiced flavor of classic pumpkin pie, scaled up to feed a crowd with far less fuss.

Pumpkin slab pie is the answer to every holiday hosting headache you have ever faced when trying to slice a round pie for fifteen people without it falling apart on the serving plate. Instead of juggling a fragile round crust and hoping for clean wedges, you bake the whole thing in a rimmed sheet pan, slice it into neat rectangles, and serve everyone at once. It is practical, it is beautiful in its simplicity, and the flavor is everything you want from a classic pumpkin custard filling.

What makes this particular version stand out is the balance between a sturdy, buttery pastry crust that holds its shape under a generous layer of silky pumpkin filling and a seasoning blend that leans into warm spice without tipping over into cloyingly sweet territory. The filling sets just right — smooth and tender, not rubbery — and the crust stays flaky on the bottom even after the pie cools completely. Whether you are baking for Thanksgiving, a fall potluck, or simply a weekend when you want something celebratory without turning the kitchen into a project, this is the recipe to reach for.

Why This Pumpkin Slab Pie Works So Well

Recipe Card

Pumpkin Slab Pie

A silky, warmly spiced pumpkin custard filling baked inside a buttery hand-crimped pastry crust in a rimmed sheet pan — every slice is perfectly portioned and deeply satisfying.

Prep

30 mins

Cook

35 mins

Total

65 mins

Serves

20 to 24 servings

Ingredients

3 cups all-purpose flour
1 tsp salt
1 cup cold unsalted butter, cubed
6 to 8 tbsp ice water
2 cans (15 oz each) pure pumpkin purée
1½ cups evaporated milk
4 large eggs
1½ cups granulated sugar
2 tsp ground cinnamon
1 tsp ground ginger
½ tsp ground nutmeg
¼ tsp ground cloves
1 tsp pure vanilla extract
½ tsp salt

Instructions

1. Preheat oven to 425°F (220°C) and lightly grease a 15×10-inch rimmed baking sheet.
2. Whisk flour and salt together in a large bowl, then cut in cold cubed butter using a pastry cutter until the mixture resembles coarse crumbs.
3. Drizzle in ice water one tablespoon at a time, stirring gently until the dough just comes together — do not overwork.
4. Roll the dough out on a lightly floured surface into a rectangle slightly larger than your pan, then carefully transfer it into the baking sheet, pressing it up the sides and crimping the edges with your fingers.
5. In a large bowl, whisk together pumpkin purée, evaporated milk, eggs, sugar, cinnamon, ginger, nutmeg, cloves, vanilla, and salt until completely smooth.
6. Pour the pumpkin filling evenly over the prepared crust, spreading it gently to the edges.
7. Bake at 425°F for 15 minutes, then reduce temperature to 350°F (175°C) and continue baking for 18 to 20 minutes, until the filling is just set with a very slight jiggle in the very centre.
8. Remove from oven and allow to cool completely on a wire rack before slicing into squares and serving.

Tips & Notes

– No chilling required for the crust — the cold butter and ice water are enough to create a flaky, tender pastry without refrigerating.
– The pie is fully set when the edges are firm and the centre has only a very subtle wobble; it will firm up as it cools.
– Store leftovers covered in the refrigerator for up to 4 days.
– For clean, even slices, use a sharp chef’s knife wiped clean between each cut.
– You can make the crust one day ahead and keep it pressed into the pan, covered with plastic wrap, in the refrigerator overnight.

KitchenGuide101.com

The real secret here is geometry. A standard round pie serves six to eight people comfortably, and cutting it cleanly requires a confident hand and a good knife. A half-sheet pan, which measures roughly 18 by 13 inches, gives you nearly three times the surface area, which means you can cut twenty to twenty-four tidy rectangles without any of the awkwardness of pie-wedge geometry. Every piece has a generous ratio of crisp crust to creamy filling, and because the filling layer is slightly shallower than a deep-dish round pie, it bakes more evenly and sets faster. No more worrying about a jiggly center while the edges overbake.

The crust here is also a double-batch pastry pressed and rolled to fit the pan, which means you get crust on the bottom and, if you choose, a decorative lattice or simple cut-out top. Because slab pies have so much surface area, even a partial top crust with simple leaf or star cut-outs looks striking with very little effort. The filling itself is built on pumpkin puree, eggs, a touch of brown sugar, maple syrup for depth, and a blend of cinnamon, ginger, nutmeg, and cloves — a combination that smells like fall from the moment it goes into the oven.

What You’ll Need to Make This Pie

For the pastry, you will need all-purpose flour, cold unsalted butter, a pinch of salt, a small amount of granulated sugar, and ice-cold water. The butter should come straight from the refrigerator and be cut into small cubes — cold fat is the key to a flaky, layered crust. You will need enough dough for a double batch since you are lining a large pan and have enough left over for a decorative top if desired.

For the filling, gather two 15-ounce cans of pure pumpkin puree (not pumpkin pie mix), four large eggs, one cup of packed light brown sugar, half a cup of pure maple syrup, one and a half cups of full-fat evaporated milk, two teaspoons of ground cinnamon, one teaspoon of ground ginger, half a teaspoon of ground nutmeg, a quarter teaspoon of ground cloves, a quarter teaspoon of fine salt, and one teaspoon of alcohol-free vanilla extract. The evaporated milk gives the custard its creamy body without making the filling too loose. If you prefer a slightly richer result, you can swap half of the evaporated milk for heavy cream.

You will also need a half-sheet rimmed baking pan, parchment paper, a rolling pin, and pie weights or dried beans for blind baking.

How to Make the Pumpkin Slab Pie Step by Step

Start with the pastry. Whisk together three cups of all-purpose flour, two tablespoons of granulated sugar, and one teaspoon of salt in a large bowl. Add one and a quarter cups of cold unsalted butter, cut into small cubes, and work it into the flour using your fingertips or a pastry cutter until the mixture resembles coarse crumbs with some pea-sized butter pieces still visible. Drizzle in six to eight tablespoons of ice water, one tablespoon at a time, stirring with a fork just until the dough starts to come together. Divide the dough into two portions — one slightly larger than the other — flatten each into a disk, wrap them tightly, and refrigerate for at least one hour.

When you are ready to bake, preheat your oven to 400 degrees Fahrenheit. Roll out the larger disk of dough on a lightly floured surface into a rectangle large enough to line the bottom and sides of your half-sheet pan with a small overhang. Carefully transfer the dough to the pan, press it into the corners, and trim any excess to about half an inch of overhang, folding and crimping the edge neatly. Line the crust with parchment paper, fill with pie weights, and blind bake for fifteen minutes. Remove the weights and parchment, prick the bottom a few times with a fork, and return to the oven for five more minutes until the surface looks dry and just barely golden. Let the crust cool slightly before adding the filling.

To make the filling, whisk together the pumpkin puree, eggs, brown sugar, maple syrup, evaporated milk, all the spices, salt, and vanilla in a large bowl until completely smooth. Pour the filling evenly over the par-baked crust. If you are using a decorative top, roll out your remaining dough and cut shapes with small cookie cutters — leaves, acorns, and stars all work beautifully — and arrange them over the filling before baking.

Reduce the oven temperature to 375 degrees Fahrenheit and bake the filled pie for 35 to 40 minutes. The filling is done when the edges are fully set and the center has just a slight wobble, similar to a gently set custard. A toothpick inserted near the center should come out with just a few moist crumbs. Remove the pie from the oven and let it cool completely on a wire rack — at least two hours — before slicing. Cutting into it too soon will give you filling that slides rather than holds.

Tips for the Best Results Every Time

Keep everything cold when making the pastry. If the butter starts to soften while you are working the dough, put the whole bowl in the freezer for ten minutes before continuing.
Do not skip the blind bake. The bottom crust will become soggy if you pour the wet filling directly onto raw dough in a pan this size.
Tent the pie loosely with foil after the first twenty minutes of baking if the crust edges are browning faster than the filling is setting.
Let the pie cool fully before refrigerating it. Placing a warm custard pie in the refrigerator causes condensation that can make the crust soften.
Use a thin, sharp knife and wipe it clean between cuts for the cleanest rectangles.
Room-temperature eggs and evaporated milk blend into the filling more smoothly than cold ingredients straight from the refrigerator.

Ways to Change Up This Recipe

Once you have the base recipe down, there are several easy directions you can take it depending on your crowd and the season.

Brown butter crust: Brown a portion of the butter before chilling and using it in the pastry for a nutty, toasted flavor that pairs beautifully with the pumpkin spice filling.
Cream cheese swirl: Beat together four ounces of softened cream cheese with two tablespoons of powdered sugar and a splash of vanilla. Drop spoonfuls over the pumpkin filling before baking and swirl gently with a skewer for a marbled look and a slight tang.
Pecan streusel top: Skip the pastry top and instead scatter a simple streusel of chopped pecans, brown sugar, flour, and cold butter over the filling before baking for a crunchy, nutty contrast.
Chocolate crust: Replace a quarter cup of the flour in the pastry with unsweetened cocoa powder for a subtly chocolate-flavored crust that makes the orange filling pop visually.
Maple glaze finish: Once the pie is fully cooled, drizzle a thin glaze of powdered sugar whisked with pure maple syrup over the top for a glossy, sweet finish.
Pumpkin spice whipped cream: Serve each slice with a dollop of lightly sweetened whipped cream that has been folded with a pinch of cinnamon and nutmeg for a simple but elegant finishing touch.

How to Store and Reheat Your Slab Pie

Once the pie has cooled completely, cover the pan tightly with plastic wrap or transfer individual slices to an airtight container. The pie will keep well in the refrigerator for up to four days. Because the filling is egg-based, it should not be left at room temperature for more than two hours after serving.

To freeze, place the fully cooled, uncut pie on a flat surface in the freezer until solid, then wrap it tightly in two layers of plastic wrap followed by a layer of aluminum foil. It will keep in the freezer for up to two months. Thaw overnight in the refrigerator before slicing and serving.

If you prefer to serve the pie warm, place individual slices on a baking sheet and warm them in a 325-degree oven for about ten minutes. The crust will crisp back up slightly and the filling will be gently warmed through without becoming rubbery. Avoid using a microwave for reheating — it tends to make the crust soft and the filling unevenly hot.

Frequently Asked Questions

Can you use homemade pumpkin puree? Yes, but make sure to drain it well through a cheesecloth or a fine mesh strainer for several hours before using. Homemade puree tends to hold more water than canned, and excess moisture can prevent the custard from setting properly.
What size pan should you use? A standard half-sheet rimmed baking pan, roughly 18 by 13 inches, is ideal. A quarter-sheet pan will give you a thicker filling layer and will need a longer baking time.
Can you make this ahead of time? Absolutely. The dough can be made and refrigerated up to three days in advance, and the fully baked pie can be made a day ahead and stored in the refrigerator until you are ready to serve.
Why did my filling crack? Cracking usually happens when the pie is overbaked or cooled too quickly in a draft. Pull the pie from the oven when the center still has a slight wobble, and let it cool gradually at room temperature away from air vents or open windows.

Save This Pumpkin Slab Pie Recipe for Later

If this pumpkin slab pie post was helpful, save it to your Pinterest board so it is ready the next time the craving or the occasion strikes. Whether you are hosting a holiday dinner or simply want a crowd-friendly fall bake that actually delivers on flavor and ease, this is one recipe worth keeping close. You can always find more ideas like this one over at KitchenGuide101, where the goal is always to make your time in the kitchen feel a little more rewarding and a lot less stressful.