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Peach-Berry Rhubarb Slab Pie: A Summer Symphony in Every Slice

There’s a certain magic to summer evenings, especially when a warm, fragrant pie is involved. I remember one particular Fourth of July, years ago, spent at my grandmother’s farm. The air was thick with the scent of honeysuckle and freshly cut grass. As dusk settled, she pulled a bubbling slab pie from her ancient oven, its crust golden and glistening. The combination of sweet peaches, tart berries, and tangy rhubarb created a flavor explosion that instantly transported me to pie heaven. Every bite was a taste of sunshine and happiness, a feeling I’ve tried to capture in my own baking ever since. This Peach-Berry Rhubarb Slab Pie is my attempt to recreate that cherished memory, and hopefully, create a new one for you.

Recipe Overview

Prep Time: 45 minutes
Cook Time: 45 minutes
Total Time: 1 hour 30 minutes
Servings: 12
Yield: 1 9×13 inch pie
Dietary Type: Vegetarian

Ingredients

For the Filling:

8 peaches (small or medium)
½ cup raspberries
½ cup blackberries
¾ cup strawberries (quartered)
1 cup rhubarb (cut into 1/4 – 1/2 inch pieces)
1 ½ teaspoons cinnamon
2 tablespoons butter
3 tablespoons corn syrup
1 tablespoon honey
2 teaspoons lemon juice
1 tablespoon fresh squeezed orange juice
1 teaspoon cornstarch
1 ½ cups granulated sugar
All-purpose flour

For the Crust:

2 ¼ cups all-purpose flour
¾ teaspoon salt
1 cup butter
⅓ cup shortening
8 -10 tablespoons cold water
¼ cup granulated sugar
1 teaspoon cinnamon

For the Streusel Topping:

1 ½ cups all-purpose flour
1 ½ cups granulated sugar
3 teaspoons cinnamon
½ cup butter (softened)
2 tablespoons cold water

Equipment Needed

9×13 inch glass baking dish
Medium mixing bowls
Pastry blender
Fork
Pastry brush
Medium saucepan

Instructions

Prepare the crust: In a medium bowl, stir together the flour and salt until well combined. Add the butter (1 cup) and shortening, then cut in with a pastry blender until the flour appears crumbly, and no crumbs are larger than pea size.
Gradually add the cold water, one tablespoon at a time, tossing thoroughly with a fork after each addition until the dough sticks together. The dough should be only slightly moist and should still retain a crumbly appearance until pressed together between fingers.
Place the mixture into an ungreased 9 x 13 inch glass baking dish and flatten to the bottom, pressing the dough halfway up the sides of the baking dish.
Melt the remaining tablespoon of butter and brush over the crust using a pastry brush.
Immediately sprinkle with the cinnamon and sugar (1/4 cup sugar, 1 tsp cinnamon) and set aside.
Make the filling: Peel and slice two of the peaches and place into a medium bowl. Add the strawberries, blackberries, raspberries, and rhubarb.
In a small bowl, combine 1 tablespoon of flour and 2 tablespoons of sugar, then pour over the fruit and toss until the fruit is evenly coated. Set aside.
Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius).
In a medium saucepan, add the remaining peaches (peeled and sliced), cinnamon (1 1/2 tsp), butter (2 tbsp), corn syrup, honey, lemon juice, orange juice, and the remaining sugar (1 1/2 cups).
Begin cooking over medium heat, stirring constantly until juices form.
Mix the cornstarch with 1 teaspoon of water and gradually pour into the mixture while stirring constantly.
Allow the mixture to come to a boil. Continue to boil, stirring occasionally, until the mixture thickens.
Once thickened, stir constantly until the liquid portion of the filling sticks to the spoon when removed from the pan. It should almost have the appearance of cooled pie filling.
Remove from heat and add the remaining fruit, stirring juices into the flour mixture before adding to the filling. Lightly stir to combine and set aside.
Place the empty pie crust in the oven on the middle rack and bake until the butter is melted, and the cinnamon and sugar appear to have absorbed into the crust. This should take about 10-15 minutes.
In the meantime, prepare the streusel: In a medium bowl, combine all streusel ingredients (flour, sugar, cinnamon, softened butter, and cold water) and stir together until crumbly and all dry ingredients appear a bit moist. Set aside.
Remove the crust from the oven and top evenly with the pie filling.
Cover with the streusel, paying special attention to the sides as the filling tends to bubble up over the topping along the edges.
Bake on the center rack for approximately 45 minutes, or until the crust appears golden, and the streusel is crunchy.
Remove from the oven and cool completely, then slice into 12 pieces.

Expert Tips & Tricks

Chill the butter: For the flakiest crust, make sure your butter and shortening are very cold before cutting them into the flour. You can even chill the flour itself for 30 minutes before starting.
Don’t overwork the dough: Overworking the dough will develop the gluten, resulting in a tough crust. Mix only until the dough comes together.
Par-bake the crust: Baking the crust for a few minutes before adding the filling helps prevent a soggy bottom.
Adjust sweetness to taste: Taste the filling before adding it to the crust and adjust the amount of sugar as needed, depending on the sweetness of your fruit.
Prevent burning: If the streusel starts to brown too quickly, tent the pie with foil during the last 15 minutes of baking.

Serving & Storage Suggestions

Serve this pie slightly warm or at room temperature. A scoop of vanilla ice cream or a dollop of whipped cream is a perfect complement. Leftovers can be stored in the refrigerator for up to 3 days. For longer storage, freeze individual slices wrapped tightly in plastic wrap and then placed in a freezer bag. Reheat frozen slices in a 350°F (175°C) oven until warmed through.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	695 kcal	N/A
Calories from Fat	282 g	41%
Total Fat	31.4 g	48%
Saturated Fat	17.3 g	86%
Cholesterol	66.1 mg	22%
Sodium	367.5 mg	15%
Total Carbohydrate	102.3 g	34%
Dietary Fiber	4.2 g	16%
Sugars	66.5 g	265%
Protein	5.6 g	11%

Variations & Substitutions

Gluten-free: Use a gluten-free all-purpose flour blend and gluten-free pie crust recipe.
Vegan: Substitute the butter in the crust and streusel with vegan butter. Use maple syrup instead of honey in the filling.
Fruit Variations: Feel free to substitute other berries or fruits depending on what’s in season. Apples, pears, or blueberries would all be delicious additions.
Spice it up: Add a pinch of cardamom or ginger to the filling for a warmer flavor.

FAQs (Frequently Asked Questions)

Q: Can I use frozen fruit?

A: Yes, you can use frozen fruit. However, be sure to thaw it completely and drain off any excess liquid before adding it to the filling. This will prevent the pie from becoming too watery.

Q: How do I prevent the crust from burning?

A: If the crust starts to brown too quickly, you can cover the edges with foil or a pie shield during the last 15-20 minutes of baking.

Q: Can I make the crust ahead of time?

A: Absolutely! The crust can be made a day or two in advance and stored in the refrigerator, tightly wrapped in plastic wrap. You can also freeze it for longer storage.

Q: How do I know when the pie is done?

A: The pie is done when the crust is golden brown, the streusel is crunchy, and the filling is bubbling.

Q: My filling is too runny. What did I do wrong?

A: This can happen if the fruit releases too much juice during baking. Make sure to drain any excess liquid from the fruit before adding it to the filling. You can also try adding a little extra cornstarch to help thicken it up.

Final Thoughts

This Peach-Berry Rhubarb Slab Pie is more than just a dessert; it’s an experience. It’s a celebration of summer flavors, a testament to the simple joys of baking, and a perfect way to share love and happiness with those you cherish. So, gather your ingredients, preheat your oven, and let the aroma of this incredible pie fill your home. I encourage you to give this recipe a try. Don’t be afraid to experiment with different fruits or spices to create your own unique twist. And most importantly, enjoy the process of baking and the joy of sharing this delicious pie with family and friends. Perhaps pair it with a glass of crisp white wine or a scoop of homemade vanilla ice cream for the ultimate summer indulgence! Happy Baking!

Peach-Berry Rhubarb Slab Pie Recipe