Pumpkin Slab Pie (Feeds a Crowd)

Perfectly creamy and spiced pumpkin slab pie truly feeds a crowd. Simplify Thanksgiving dessert with one big pumpkin pie– a wonderful alternative to making a couple smaller pies!

Perfectly creamy and spiced pumpkin slab pie to feed a crowd! Recipe on sallysbakingaddiction.com

With a new week comes a new pumpkin treat! (Find all of my pumpkin recipes here.) I made this pumpkin slab pie for our friends who visited over the weekend and while the pumpkin filling received glowing reviews, everyone commented on the thick, buttery, flaky pie crust. And the cute pie crust leaves too!

Perfectly creamy and spiced pumpkin slab pie to feed a crowd! Recipe on sallysbakingaddiction.com

This Pumpkin Slab Pie Feeds a Crowd

We’ve all faced the “I need to feed an actual army of people dessert on Thanksgiving and don’t feel like making 1200 pies” problem. Today = problem solved. A pumpkin pie for an actual army of people. Slab pies are a great dessert if you’re hosting a large gathering because:

  • Slab pie is cut into bars so it’s easy to slice, serve, and eat (and less messy).
  • Guests can eat slices with a fork or hands.
  • Leftover slab pie bars are easier to freeze compared to traditional pie slices.
  • It’s similar to my pumpkin pie recipe but serves many more.
  • It wows a crowd and is festive, too!

How to make pumpkin slab pie on sallysbakingaddiction.com

Pumpkin Slab Pie Filling

Channeling my favorite pumpkin pie recipe, I pretty much doubled each ingredient to make a much larger pie. Each ingredient plays an important role, so let’s review:

  • Pumpkin: This is a big pie so we’re using lots of pumpkin. You can use canned pumpkin puree or fresh pumpkin puree, but I always have the best luck with canned pumpkin in pie recipes. I like Libby’s brand.
  • Brown Sugar: I sweeten this pumpkin slab pie with only brown sugar, not regular white granulated sugar. I use a mix of light brown sugar (1 cup) and dark brown sugar (1 cup) for a layered flavor, though you can use one or another.
  • Eggs: We use 4 eggs in this slab pie filling. It’s just the right number– any more and the pie will taste egg-y.
  • Cream + Milk: The combination of whole milk and real cream create the most luxurious pumpkin pie you’ll ever taste.
  • Salt + Vanilla Extract: Salt and vanilla extract add flavor. (Try using homemade vanilla extract.)
  • Cornstarch: Cornstarch helps thicken the pumpkin pie filling.
  • Spices: Gang’s all here! We’re using classic pumpkin pie spices like cinnamon, ginger, and nutmeg.
  • Black Pepper: A pinch of black pepper adds one more phenomenal layer of flavor. It’s the secret ingredient I use in my regular pumpkin pie recipe and I simply couldn’t leave it out of this slab version. It’s bizarre, but I’ve gotten a lot wonderful feedback from readers on this! No one will know it’s in there except for you. (And all your pumpkin pie eaters will fall in love with the sweet spiced flavor.)

How to make pumpkin slab pie on sallysbakingaddiction.com

Pumpkin Slab Pie Crust

All-butter pie crust is the only way to go for pumpkin slab pie! If you’ve made my apple slab pie before, you’re familiar with it. It’s enough for the foundation of this pie and you’ll have enough leftover to make adorable leaves, too. Make sure your pie crust ingredients are extra cold.

Time-saving bonus! Begin the crust the night before. I always let my pie crust chill over night before rolling/shaping and highly recommend you do the same.

Optional Pie Crust Decoration

Use any leftover dough for some pie crust leaves. Roll out the dough and cut it into shapes using leaf cookie cutters. Bake the leaves separately. I like how the leaves look placed on top of the baked pie rather than baking them directly on the pie. (When I placed them on top of the pumpkin pie filling, they moved around and looked a little odd once the pie was finished baking.)

How to make pie crust leaves on pumpkin slab pie on sallysbakingaddiction.com

Perfectly creamy and spiced pumpkin slab pie to feed a crowd! Recipe on sallysbakingaddiction.com

Best Pumpkin Slab Pie Pan

The most important part! Use the correct size pan. Any larger and you won’t have quite enough dough. Any smaller and you’ll have some overflow. You need a 10×15 inch jelly roll baking pan. It’s the same pan you need for pumpkin roll and pumpkin bars, too.

Perfectly creamy and spiced pumpkin slab pie to feed a crowd! Recipe on sallysbakingaddiction.com

Perfectly creamy and spiced pumpkin slab pie to feed a crowd! Recipe on sallysbakingaddiction.com

Don’t forget the whipped cream on top!

More Desserts That Feed a Crowd

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Pumpkin Slab Pie

  • Author: Sally
  • Prep Time: 3 hours
  • Cook Time: 45 minutes
  • Total Time: 3 hours, 45 minutes
  • Yield: 24 slices
  • Category: Pie
  • Method: Baking
  • Cuisine: American


This pumpkin slab pie feeds a crowd. It’s perfectly creamy and spiced with an ultra buttery flaky pie crust and a secret ingredient everyone loves!


  • 4 cups (500g) all-purpose flour (spoon & leveled)
  • 1 and 1/2 teaspoons salt
  • 1 teaspoon granulated sugar
  • 1 and 3/4 cup (3.5 sticks; 400g) unsalted butter, very cold and cubed
  • 3/4 cup (180ml) very cold ice water
  • egg wash: 1 large egg, lightly beaten with 1 Tablespoon (15ml) milk


  • 2 (15 ounce) cans pure pumpkin (about 4 cups total; 900g)*
  • 2 cups (400g) light or dark brown sugar
  • 4 large eggs
  • 2 cups (480ml) heavy cream
  • 1/4 cup (60ml) whole milk
  • 1 teaspoon pure vanilla extract
  • 2 Tablespoons cornstarch
  • 2 teaspoons ground cinnamon
  • 3/4 teaspoon ground ginger
  • 1/2 teaspoon ground nutmeg
  • 1/2 teaspoon salt
  • 1/8 teaspoon fresh ground pepper*
  • optional: whipped cream


  1. Make the pie crust: Mix the flour, salt, and sugar together in a large bowl. Add the butter. Using a pastry cutter or two forks, cut the butter into the mixture until it resembles coarse meal (pea-sized bits with a few larger bits of fat is OK). A pastry cutter makes this step very easy and quick. Drizzle the cold water in, 1 Tablespoon (15ml) at a time, and stir with a rubber spatula or wooden spoon after every Tablespoon (15ml) added. Do not add any more water than you need. Stop adding water when the dough begins to form large clumps. I always use about 3/4 cup (180ml) water. Transfer the pie dough to a floured work surface. Using floured hands, fold the dough into itself until the flour is fully incorporated into the butter pieces. The dough should come together easily and should not feel overly sticky. Form dough into a ball. Cut off about 1/4 of the dough; this will be for the pie crust leaves and the rest will be for the actual pie. Flatten both into a 1-inch thick disc using your hands. Wrap each tightly in plastic wrap. Refrigerate for at least 2 hours (and up to 5 days) or freeze for up to 3 months. Thaw overnight in the fridge before using. *If not making pie crust leaves, just wrap all the dough up, chill, and use it all for the bottom crust.
  2. Make the filling: Whisk all of the filling ingredients together in a large bowl. It will be a little thick. Cover and refrigerate until you need it; or refrigerate up to 3 days.
  3. Preheat oven to 375°F (190°C).
  4. Roll out the chilled pie crust: Remove larger disc of pie dough from the refrigerator. Keep the other in the refrigerator as you work. On a lightly floured work surface, roll the dough out into (roughly) an 18×13-inch rectangle. Make sure to turn the dough about a quarter turn after every few rolls. Carefully place the dough into a 10×15 inch jelly roll pan; there will be overhang on the sides. Smooth the crust out so it fits nicely into all the corners of the pan. Crimp the edges with your fingers, if desired. Brush edges lightly with the egg wash. Reserve remaining egg wash for step 6.
  5. Spread filling evenly into the crust. Bake for 35-45 minutes or until the filling is only slightly jiggly in the very center. Remove from the oven, set on a wire rack, and allow to cool completely.
  6. Pie crust leaves: As the pie cools, roll out remaining dough. Roll out into any shape you really want (doesn’t matter) and 1/8 inch thickness. Using leaf cookie cutters, cut into shapes. Brush each lightly with egg wash. Cut leaf veins into leaves using a sharp knife or toothpick, if desired. Place onto a parchment paper or silicone baking mat-lined baking sheet and bake at 350°F (177°C) for 10 minutes or until lightly browned. Remove and set aside to cool before decorating pie.
  7. Decorate pie with pie crust leaves and/or whipped cream. Leftovers keep well covered in the refrigerator for up to 1 week.


  1. Make Ahead Instructions: The pie crust in step 1 can be made ahead of time, chilled for up to 5 days (see step 1) or frozen up to 3 months (see step 1). The filling can also be made, covered, and refrigerated for up to 3 days. See step 2. Baked pie freezes well up to 3 months.
  2. Special Tools: OXO Measuring CupsGlass Mixing Bowls | Baking Pan | Pastry Brush | Pastry Cutter | My Favorite Rolling Pin | Leaf Cookie Cutters
  3. Pumpkin: I prefer canned pumpkin, not fresh pumpkin puree in this recipe. I like to use Libby’s brand.
  4. Pepper: I like to use a heaping 1/8 teaspoon of black pepper in this slab pie. If you like spice flavor, increase to 1/4 teaspoon.

Keywords: pumpkin slab pie, pumpkin pie

Perfectly creamy and spiced pumpkin slab pie to feed a crowd! Recipe on sallysbakingaddiction.com


Comments are closed.

  1. Sally! I don’t live in the US, and I haven’t had luck with an all-butter pie crust. The weather here is too hot and humid so it melts super quickly, I’ve even tried FREEZING the butter and to work as quickly as possible using a food processor, but after I chill it (even overnight) and start rolling it out, the little specs of butter start to melt and it becomes a disaster… 
    SO, could I just use my favorite pie crust recipe (combo of shortening and butter, which works best) and double it? (would make 4 singles) I think I might end up using about 1/3 for the bottom (which means 3 single crusts combined) and use the remaining for decoration.

    I’m so sorry if this is all confusing. I just want to make sure it works out!  Thank you!

    1. Hi Lou! Feel free to use your favorite pie crust recipe!

  2. Hi! Ive been googling all over and cannot find a recipe for pumpkin pie bars/slab pie in a regular half sheet pan 12×18. How would you recommend I adjust to work this with a 12×18 pan? Thank you!!

  3. Hi! I have a 13-inch round ceramic pie plate from IKEA. Would the cooking times be about the same? (I’m so glad to see this recipe since I am making Thanksgiving dinner for 15 pumpkin pie lovers!)

    PS. I love all of your recipes and you are my immediate go-to for any recipe! Thank you so much!

    1. I’m not 100% sure, so just keep your eye on it. The filling should *mostly* be set.

  4. Put your whipped cream in a pastry bag to make pretty rosettes

  5. Hi Sally! I just made this slab pie as a test run before Thanksgiving and while it tastes amazing, it bubbled up in the oven and then cracked as soon as it came out 🙁 Any idea what I could do to prevent this? I really want a pretty pie for Thanksgiving! I followed the recipe and oven temperature and baked it for 35 minutes. Thanks for your help!

    1. Hi Crystal! It likely cracked because of the drastic change in temperature. You can help avoid the cracks by keeping the pie in the oven as it cools down. So, turn off the oven and keep the pie inside so it cools down as the oven cools down. I would turn off the oven a minute or two sooner so the pie doesn’t over-bake. I hope this helps. So glad you enjoyed how it tastes!

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