Blackberry Pistachio Bars (Printable)
Buttery pistachio shortbread topped with sweet-tart blackberry filling and a golden streusel for nutty, fruity bars.
# What You'll Need:
→ Pistachio Shortbread Base
01 - 1 cup shelled unsalted pistachios
02 - 1 1/3 cups all-purpose flour
03 - 1/2 cup granulated sugar
04 - 1/4 teaspoon salt
05 - 1/2 cup unsalted butter, cold and cubed
→ Blackberry Filling
06 - 2 cups fresh blackberries or thawed frozen blackberries
07 - 1/3 cup granulated sugar
08 - 1 tablespoon lemon juice
09 - 1 tablespoon cornstarch
→ Streusel Topping
10 - 1/2 cup all-purpose flour
11 - 1/4 cup rolled oats
12 - 1/3 cup brown sugar
13 - 1/4 cup cold unsalted butter, cubed
14 - 1/3 cup shelled pistachios, roughly chopped
# How-To Steps:
01 - Preheat oven to 350°F. Line an 8x8-inch baking pan with parchment paper, allowing overhang for easy removal.
02 - In a food processor, pulse pistachios until finely ground. Add flour, sugar, and salt, then pulse to combine. Add cold butter and pulse until mixture resembles coarse crumbs.
03 - Press the pistachio mixture evenly into the prepared pan. Bake for 12 to 15 minutes, or until edges are lightly golden.
04 - While base is baking, combine blackberries, sugar, lemon juice, and cornstarch in a bowl. Lightly mash berries to release some juices.
05 - In a separate bowl, mix flour, oats, brown sugar, and chopped pistachios. Add cold butter and rub in using fingertips until the mixture becomes crumbly.
06 - Spread blackberry filling evenly over the warm base. Distribute streusel topping over blackberries in an even layer.
07 - Bake for 20 to 22 minutes, until the streusel is golden and blackberry filling is bubbling at the edges.
08 - Allow to cool completely in the pan. Use parchment overhang to lift, then cut into 16 bars and serve.
# Expert Advice:
01 -
- Every bite combines that tart berry pop with rich, nutty pistachio shortbread—impossible to stop at one.
- It’s a no-fuss stunner that baked its way into my heart (and plenty of picnic baskets) thanks to how forgiving and surprising it is.
02 -
- I once tried to rush slicing while the bars were still warm—big mistake, they fell apart and stained my sleeves, so patience is required.
- Using really cold butter in the shortbread and streusel makes all the difference for flakiness and satisfying crunch.
03 -
- Toast the pistachios in the oven for 4 minutes before using—this simple step amplifies the flavor tenfold.
- Let the bars cool—really cool—before slicing, or you’ll battle runaway blackberry filling every time.