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Blackberry Pistachio Crumble Bars Recipe

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4.2 from 7 reviews

Delight in these Blackberry Pistachio Crumble Bars featuring a buttery oat and flour crust, topped with juicy blackberries and crunchy roasted pistachios. Perfectly balanced with a hint of cinnamon and a touch of sea salt, these bars offer a delightful blend of tart fruit and nutty crumble, baked to a golden finish for a satisfying dessert or snack.

  • Total Time: 50 minutes
  • Yield: 9 servings

Ingredients

Dry Ingredients

  • 1 1/2 cups Bob’s Red Mill Gluten Free Organic Old Fashioned Rolled Oats
  • 1 1/4 cups + 1 tablespoon all-purpose flour
  • 1/2 teaspoon cinnamon
  • 1/2 teaspoon baking soda
  • 3/4 teaspoon salt

Wet Ingredients and Mix-ins

  • 1 cup unsalted butter, melted and cooled
  • 1 cup light brown sugar, loosely packed
  • 1 teaspoon vanilla extract
  • 1/2 cup roasted, salted pistachios, coarsely chopped
  • Flaky sea salt, optional

Blackberry Filling

  • 12 ounces blackberries
  • 1 tablespoon cornstarch
  • 1 tablespoon sugar
  • 1 tablespoon lemon juice
  • Pinch of salt

Instructions

  1. Prepare the baking pan: Preheat your oven to 350℉. Spray an 8×8 square metal or glass baking dish with nonstick spray, line it with parchment paper, and spray the parchment again to ensure easy removal. Set aside.
  2. Make the crumble base: In a medium bowl, whisk together the oats, flour, cinnamon, baking soda, and salt until well combined. In a separate large bowl, whisk the melted butter, brown sugar, and vanilla extract until smooth. Mix the dry ingredients into the wet mixture using a rubber spatula, then fold in the chopped pistachios. Let the dough rest for 5 minutes to allow the flour to absorb moisture. If the dough remains too loose, add more flour one tablespoon at a time until it resembles wet sand. Set aside.
  3. Prepare the blackberry filling: In a medium bowl, combine the blackberries, cornstarch, sugar, lemon juice, and a pinch of salt. For a more uniform texture, gently mash oversized blackberries with a spoon. Set aside.
  4. Assemble the bars: Press a little over half of the crumble mixture evenly into the bottom of the prepared pan to form a smooth crust. Spread the blackberry filling evenly over this crust. Crumble the remaining crumble mixture over the blackberry layer to cover it evenly.
  5. Bake the crumble bars: Place the pan in the preheated oven and bake for 35 minutes, until the crumble topping is golden brown and the filling is set. Optionally, sprinkle flaky sea salt on top immediately after baking for extra flavor.
  6. Cool and serve: Allow the bars to cool completely in the pan before cutting them into 9 squares for serving.

Notes

  • Line the pan with parchment paper and spray twice to ensure bars release easily.
  • Resting the dough helps achieve the perfect crumbly texture.
  • Adding extra flour gradually helps manage dough consistency if too loose.
  • Roasted, salted pistachios add a nice crunch and flavor contrast.
  • Flaky sea salt on top enhances the sweetness and balances flavors.
  • Bars can be stored in an airtight container for up to 3 days at room temperature or refrigerated for up to a week.
  • Author: Maya
  • Prep Time: 15 minutes
  • Cook Time: 35 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Gluten Free

Find it online: https://recipeteach.com/blackberry-pistachio-crumble-bars-recipe/