Creating your delicious Blackberry Pistachio Dream Bars is simple and enjoyable. Follow these steps for incredible results:

1. Preheat Your Oven: Preheat your oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper, leaving some overhang for easy removal later.

2. Prepare the Crust: In a large bowl, combine the flour, sugar, butter, and salt. Use a pastry cutter or your hands to mix until the mixture resembles fine crumbs.

3. Press Into the Pan: Press the crust mixture evenly into the bottom of the prepared pan, creating a firm layer.

4. Blind Bake the Crust: Place the crust in the preheated oven and bake for 15 minutes, or until lightly golden. Remove from the oven and allow it to cool slightly.

5. Prepare the Filling: In another bowl, gently mash the blackberries. Then, add sugar, cornstarch, eggs, vanilla extract, and almond extract. Mix until well combined.

6. Spread the Filling: Pour the blackberry mixture over the pre-baked crust, spreading it evenly.

7. Top with Pistachios: Sprinkle chopped pistachios generously on top of the filling. For an extra touch, sprinkle a tablespoon of sugar over the pistachios if desired.

8. Bake Again: Return the pan to the oven and bake for another 15-20 minutes, or until the filling is set and the edges are bubbling.

9. Cool the Bars: Once baked, remove the pan from the oven and let it cool at room temperature for about 30 minutes. Then, transfer it to the fridge for at least 30 minutes to chill completely.

10. Slice and Serve: Once cooled, lift the bars out of the pan using the parchment paper overhang. Cut into squares or rectangles for serving.