Simple strawberry blackberry slab pie recipe with an all butter flaky pie crust feeds a crowd! This delightful dessert is perfect for summer gatherings, picnics, or family celebrations. The blend of sweet strawberries and tart blackberries creates a flavor explosion, making this Strawberry Blackberry Slab Pie a standout treat.

Jump to:
- Why You’ll Love This Recipe
- Tools and Preparation
- Essential Tools and Equipment
- Importance of Each Tool
- Ingredients
- For the Pie Crust
- For the Filling
- How to Make Strawberry Blackberry Slab Pie
- Step 1: Prepare the Pie Dough
- Step 2: Make the Filling
- Step 3: Roll Out Dough
- Step 4: Assemble the Pie
- Step 5: Bake
- How to Serve Strawberry Blackberry Slab Pie
- À La Mode
- Fresh Garnishes
- Creative Serving Styles
- How to Perfect Strawberry Blackberry Slab Pie
- Best Side Dishes for Strawberry Blackberry Slab Pie
- Common Mistakes to Avoid
- Storage & Reheating Instructions
- Refrigerator Storage
- Freezing Strawberry Blackberry Slab Pie
- Reheating Strawberry Blackberry Slab Pie
- Frequently Asked Questions
- What is a slab pie?
- Can I use frozen strawberries and blackberries?
- How do I prevent the bottom crust from getting soggy?
- How long does Strawberry Blackberry Slab Pie last in the refrigerator?
- Can I customize this recipe?
- Final Thoughts
- 📖 Recipe Card
Why You’ll Love This Recipe
- Feeds a Crowd: This slab pie recipe serves up to 18 slices, making it ideal for parties and gatherings.
- Easy to Make: With straightforward steps and simple ingredients, even novice bakers can create this delicious dessert.
- Flexible Serving Options: Serve warm with ice cream, at room temperature, or enjoy cold as leftovers—it’s delicious any way!
- Fresh and Fruity: Using fresh strawberries and blackberries ensures a burst of flavor in every bite.
- Stunning Presentation: The free-form design of the pie makes it visually appealing, perfect for impressing guests.
Tools and Preparation
Before diving into the baking process, gather your tools to ensure a smooth experience. Having everything ready will help you focus on creating that perfect pie.
Essential Tools and Equipment
- Rolling pin
- Baking sheet
- Parchment paper or silicone baking mat
- Mixing bowls
- Pastry cutter or food processor
Importance of Each Tool
- Rolling pin: Ensures an even thickness for your pie crust, which is key for consistent baking.
- Baking sheet: Provides ample space for the slab pie to bake evenly and hold its shape.
- Parchment paper or silicone baking mat: Makes transferring the rolled dough easy and prevents sticking.

Ingredients
For the Pie Crust
- 4 cups (500g) all-purpose flour (spooned & leveled)
- 1 and 1/2 teaspoons salt
- 1 teaspoon granulated sugar
- 1 and 3/4 cup (396g) unsalted butter, very cold and cubed
- 3/4 cup (180ml) ice cold water
- egg wash: 1 large egg, lightly beaten with 1 Tablespoon (15ml) milk
- optional: coarse sugar for sprinkling on top
For the Filling
- 4 cups (650g) hulled and chopped fresh strawberries
- 4 cups (500g) halved fresh blackberries
- 1/2 cup (100g) granulated sugar
- 1/4 cup (28g) cornstarch
- 1 Tablespoon (15ml) lemon juice
- 1 teaspoon pure vanilla extract
- pinch salt
How to Make Strawberry Blackberry Slab Pie
Step 1: Prepare the Pie Dough
- Mix the flour, salt, and sugar in a large bowl. Add the cold butter.
- Using a pastry cutter or food processor, cut butter into the mixture until it resembles pea-sized clumps.
- Drizzle in the ice-cold water gradually while stirring until large clumps form. Aim for about 3/4 cup total.
- Transfer dough to a floured surface. Fold until fully incorporated without being sticky.
- Form into a ball, divide in half, flatten each into thick discs, wrap tightly in plastic wrap, and refrigerate.
Step 2: Make the Filling
- In a large bowl, gently mix together strawberries, blackberries, granulated sugar, cornstarch, lemon juice, vanilla extract, and salt.
- Set aside to let flavors meld.
Step 3: Roll Out Dough
- Preheat your oven to 375°F (190°C).
- Remove one disc of dough from the refrigerator; keep the other chilled.
- Roll out the first disc on parchment paper or silicone mat into a rectangle approximately 10×16 inches.
- Carefully transfer it onto a large rimmed baking sheet.
Step 4: Assemble the Pie
- Spoon filling evenly over the crust while leaving about a 1-inch border around edges.
- Roll out the second disc similarly; drape over filling or cut into strips for a lattice effect.
- Seal edges by crimping with fingers or fork; make slits in top crust for steam release.
- Brush with egg wash and sprinkle coarse sugar if desired.
Step 5: Bake
- Bake for about 45-55 minutes until golden brown with bubbling filling.
- Allow cooling completely if serving as bars; cool at least 45 minutes if serving on plates.
Enjoy your delicious Strawberry Blackberry Slab Pie, whether warm or at room temperature!
How to Serve Strawberry Blackberry Slab Pie
Serving your Strawberry Blackberry Slab Pie can be as delightful as making it! Here are some fun ways to enjoy this summer treat.
À La Mode
- Vanilla ice cream – A classic pairing that adds a creamy contrast to the fruity filling.
- Whipped cream – Light and airy, perfect for dolloping on top of each slice.
- Coconut whipped cream – A dairy-free option that brings a tropical twist.
Fresh Garnishes
- Mint leaves – A sprinkle of fresh mint adds a refreshing flavor and a pop of color.
- Powdered sugar – Lightly dust the top for an elegant finish and added sweetness.
Creative Serving Styles
- Handheld bars – Cut into squares for easy grabbing at picnics or parties.
- Layered dessert – Crumble pieces into parfait glasses, alternating with yogurt or cream.
How to Perfect Strawberry Blackberry Slab Pie
Perfecting your Strawberry Blackberry Slab Pie involves attention to detail. Here are some tips to ensure your pie turns out beautifully every time.
- Chill your ingredients – Keep butter and water ice-cold for a flakier crust.
- Don’t overwork the dough – Mix just until combined; overworking leads to tough crusts.
- Use parchment paper – Roll out dough on parchment for easy transfer to the baking sheet.
- Let it cool properly – Allow the pie to cool completely for cleaner slices and enhanced flavors.
- Adjust sweetness to taste – Depending on berry ripeness, tweak sugar levels in the filling.
- Experiment with spices – Adding a pinch of cinnamon or nutmeg can elevate the flavor profile.
Best Side Dishes for Strawberry Blackberry Slab Pie
Pairing side dishes with your Strawberry Blackberry Slab Pie enhances the meal experience. Here are some great options.
- Fresh Fruit Salad – A mix of seasonal fruits adds brightness and balances sweetness.
- Yogurt Parfait – Layer yogurt with granola and berries for a refreshing contrast.
- Lemonade or Iced Tea – Refreshing drinks that complement the fruity flavors beautifully.
- Cheese Plate – A selection of cheeses can provide savory notes against sweet pie.
- Salad with Citrus Dressing – A light salad with citrus vinaigrette offers a zesty counterpoint.
- Grilled Vegetables – Smoky grilled veggies add depth and round out the meal nicely.
- Savory Scones – Cheese or herb scones can provide a delightful textural contrast.
- Nut Mixes – A bowl of mixed nuts offers crunchy bites that pair well with dessert.
Common Mistakes to Avoid
When making your Strawberry Blackberry Slab Pie, avoid these common pitfalls to ensure a perfect dessert every time.
- Overworking the dough: If you mix the pie crust too much, it can become tough. Handle the dough gently and only mix until combined.
- Ignoring chilling time: Skipping the refrigeration step for the dough can lead to a crust that shrinks while baking. Always chill your dough for at least 2 hours.
- Using warm butter: If your butter isn’t cold enough, your crust won’t be flaky. Ensure your butter is very cold and cubed before mixing.
- Not measuring ingredients properly: Improper measurements can affect the texture and taste of your pie. Use a kitchen scale for accuracy.
- Neglecting to seal edges: Failing to properly seal the edges can cause filling to leak out during baking. Make sure to crimp or flute edges well.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container for up to 3-4 days.
- Keep slices separated with parchment paper if stacking.
Freezing Strawberry Blackberry Slab Pie
- Wrap tightly in plastic wrap and then in aluminum foil.
- Freeze for up to 3 months for best quality.
Reheating Strawberry Blackberry Slab Pie
- Oven: Preheat to 350°F (175°C) and bake for about 15-20 minutes until warmed through.
- Microwave: Heat individual slices on medium power for about 30 seconds or until warm.
- Stovetop: Place slice in a skillet over low heat, cover, and warm for a few minutes.
Frequently Asked Questions
Here are some common questions about making Strawberry Blackberry Slab Pie.
What is a slab pie?
A slab pie is a large, free-form pie that’s baked in a sheet pan, making it easy to serve a crowd.
Can I use frozen strawberries and blackberries?
Yes, you can use frozen berries, but make sure to thaw and drain excess liquid before using them in the filling.
How do I prevent the bottom crust from getting soggy?
To avoid a soggy bottom crust, pre-bake the bottom layer for about 10 minutes before adding the filling.
How long does Strawberry Blackberry Slab Pie last in the refrigerator?
The pie will stay fresh in the refrigerator for up to 3-4 days when stored properly in an airtight container.
Can I customize this recipe?
Absolutely! You can add other berries or citrus zest for extra flavor. Feel free to adjust sweetness based on your preference.
Final Thoughts
This Strawberry Blackberry Slab Pie is not only delicious but also versatile. Perfect for summer gatherings or family dinners, you can customize it with different fruits or spices. Give it a try; your friends and family will love it!
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📖 Recipe Card
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Strawberry Blackberry Slab Pie
- Total Time: 1 hour 20 minutes
- Yield: Makes approximately 18 servings 1x
Description
Indulge in the delightful flavors of summer with this Strawberry Blackberry Slab Pie. Perfect for gatherings, picnics, or family celebrations, this easy-to-make dessert features a flaky all-butter crust that holds a vibrant filling of sweet strawberries and tart blackberries. With its stunning presentation and generous serving size, this slab pie is sure to impress guests while satisfying everyone’s sweet tooth. Whether served warm with a scoop of ice cream or enjoyed at room temperature, each slice offers a burst of fruity goodness that’s perfect for any occasion.
Ingredients
- 4 cups all-purpose flour
- 1 and 1/2 teaspoons salt
- 1 teaspoon granulated sugar
- 1 and 3/4 cups unsalted butter, very cold and cubed
- 3/4 cup ice-cold water
- 4 cups hulled and chopped fresh strawberries
- 4 cups halved fresh blackberries
- 1/2 cup granulated sugar (for filling)
- 1/4 cup cornstarch
- 1 Tablespoon lemon juice
- Pinch of salt
Instructions
- Prepare the Pie Dough: Combine flour, salt, and sugar in a bowl. Cut in cold butter until pea-sized clumps form. Gradually add ice-cold water until large clumps form. Shape into discs and refrigerate.
- Make the Filling: In a bowl, mix strawberries, blackberries, granulated sugar, cornstarch, lemon juice, and salt. Set aside.
- Roll Out Dough: Preheat oven to 375°F (190°C). Roll out one disc into a rectangle (10×16 inches) and place on a baking sheet.
- Assemble the Pie: Spread the filling over the crust with a border. Roll out second disc; drape over filling or cut strips for lattice design. Seal edges and cut slits in top crust.
- Bake: Bake for 45-55 minutes until golden brown and bubbly.
- Prep Time: 30 minutes
- Cook Time: 50 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 slice (100g)
- Calories: 290
- Sugar: 19g
- Sodium: 220mg
- Fat: 15g
- Saturated Fat: 9g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 36g
- Fiber: 2g
- Protein: 3g
- Cholesterol: 30mg