9x13 Slab Pie Recipe: Easy, Crowd-Pleasing Dessert for Any Occasion

A 9×13 slab pie is a fantastic way to serve a large group with minimal fuss, offering the perfect balance of flaky crust and luscious filling all baked in one pan. This recipe is versatile, straightforward, and delivers consistent results, making it a reliable choice for potlucks, holidays, or weeknight desserts.

Ingredients

2 ½ cups all-purpose flour, divided
1 teaspoon salt
1 cup (2 sticks) unsalted butter, cold and cubed
6 to 8 tablespoons ice water
5 cups fresh fruit filling (e.g., blueberries, apples, cherries, or peaches)
¾ cup granulated sugar (adjust based on fruit sweetness)
3 tablespoons cornstarch or tapioca starch (for thickening)
1 teaspoon lemon juice (optional, brightens fruit flavor)
1 teaspoon ground cinnamon (optional, for spiced fruit pies)
1 egg, beaten (for egg wash)
1 tablespoon coarse sugar (optional, for sprinkling on top)

Instructions

Prepare the Pie Dough: In a large bowl, whisk together 2 cups of flour and salt. Add the cold, cubed butter. Using a pastry cutter or your fingertips, cut the butter into the flour until the mixture resembles coarse crumbs with pea-sized pieces of butter remaining.

Add Ice Water: Gradually add ice water, one tablespoon at a time, mixing gently with a fork until the dough just comes together. Avoid overworking to keep the crust tender.
Divide and Chill Dough: Shape the dough into two flat discs, wrap each in plastic wrap, and refrigerate for at least 1 hour. Chilling helps relax gluten and firm up the butter.
Prepare the Filling: In a large bowl, combine the fruit, sugar, cornstarch, lemon juice, and cinnamon (if using). Toss gently to coat evenly. Set aside while rolling out the dough.

Roll Out Bottom Crust: Lightly flour your work surface and roll out one dough disc into a rectangle about 13×9 inches and roughly 1/8 inch thick. Carefully transfer it to a greased 9×13-inch baking pan, pressing it into the corners.
Add the Filling: Pour the fruit mixture evenly over the bottom crust, spreading it gently to the edges.
Roll Out Top Crust: Roll out the second dough disc to the same size and thickness. Place it over the filling. Trim excess dough from edges and press the edges together to seal, crimping decoratively if desired. Cut a few small slits in the top crust to allow steam to escape.

Apply Egg Wash: Brush the top crust with the beaten egg for a golden finish. Sprinkle coarse sugar over the crust if you like extra sparkle and crunch.
Bake: Preheat the oven to 375°F (190°C). Bake the pie on the middle rack for 45 to 55 minutes, or until the crust is golden brown and the filling is bubbling. If the crust browns too quickly, loosely tent with foil halfway through baking.
Cool Before Serving: Allow the pie to cool on a wire rack for at least 2 hours so the filling sets properly, ensuring clean slices.

Tips

Substitutions: For a gluten-free crust, use a certified gluten-free flour blend and add 1 teaspoon xanthan gum if it’s not included. You can swap butter for chilled coconut oil for a dairy-free crust, but expect a slightly different texture and flavor.
Fruit Choices: Use fresh or frozen fruit (thawed and drained). Adjust sugar based on fruit sweetness and type (berries generally need less sugar than apples or peaches).
Prevent a Soggy Bottom: To avoid a soggy crust, you can lightly brush the bottom crust with beaten egg white before adding the filling or sprinkle a thin layer of ground nuts or breadcrumbs on the crust to absorb excess moisture.

Common Mistake: Overworking the dough warms the butter and develops gluten, resulting in a tough crust. Work quickly and handle the dough minimally to maintain flakiness.

Serving Suggestions

This slab pie is delicious served warm or at room temperature. For an extra touch, add a scoop of vanilla ice cream or a dollop of whipped cream. A drizzle of caramel sauce or a sprinkle of toasted nuts also pairs beautifully, especially with apple or peach fillings. It’s perfect for casual family dinners, picnics, or dessert buffets.

Variations

You can customize this slab pie to suit any season or occasion. Try a mixed berry filling with blueberries, raspberries, and blackberries. For a classic American favorite, use peeled and sliced tart apples with cinnamon and nutmeg. Peach and raspberry together create a lovely sweet-tart combo. For a richer dessert, add a handful of chocolate chips or chopped nuts into the filling. Savory slab pies are also an option—replace the fruit with cooked vegetables, cheese, and herbs, and omit sugar and cinnamon.

Storage and Reheating

Cover leftover slab pie tightly with plastic wrap or foil and store in the refrigerator for up to 4 days. To freeze, wrap the cooled pie in plastic wrap and then foil, freezing for up to 2 months. Thaw overnight in the refrigerator before reheating. Reheat slices in a 350°F (175°C) oven for 10-15 minutes until warmed through and crust is crisp. Avoid microwaving to prevent a soggy crust.

Frequently Asked Questions

Can I make the pie crust ahead of time?
Yes, you can make the dough up to 2 days in advance. Keep it well wrapped in the refrigerator. You can also freeze dough discs for up to 1 month; thaw overnight in the fridge before rolling out.

How do I prevent the filling from being too runny?
Use the right amount of thickener like cornstarch or tapioca starch, and allow the pie to cool completely before slicing. If your fruit is very juicy, increase the thickener by 1 tablespoon or drain excess juice before mixing.

What if my top crust browns too fast?
If the crust is browning too quickly, cover the pie loosely with aluminum foil halfway through baking. This shields the crust while allowing the filling to cook fully.

Can I use frozen fruit in this slab pie?
Yes, frozen fruit works well but should be thawed and drained to remove excess liquid. This prevents a soggy crust and ensures the filling thickens properly.

How do I get clean slices when serving?
Let the pie cool for at least 2 hours so the filling sets. Use a sharp serrated knife and wipe it clean between cuts for neat slices.

Is it better to use butter or shortening in the crust?
Butter provides excellent flavor and flakiness but can be less forgiving to work with because it melts quickly. Shortening is easier to handle and yields a tender crust but lacks butter’s rich flavor. Combining both can balance flavor and texture.

With this 9×13 slab pie recipe, you have a reliable, crowd-pleasing dessert that’s easy to customize and perfect for any occasion. Whether you prefer classic apple or mixed berries, this method guarantees flaky crust and luscious filling every time.

9×13 Slab Pie Recipe: Easy, Crowd-Pleasing Dessert for Any Occasion