Creating Dark Chocolate Raspberry Pie Bars is simple when you follow these step-by-step instructions:

1. Preheat the Oven: Set your oven to 350°F (175°C) and grease a 9×9-inch baking pan.
2. Make the Crust: In a large bowl, combine flour, sugar, cocoa powder, and salt. Add the melted butter and egg, then mix until the dough starts to come together.
3. Press the Crust: Spread the crust mixture evenly into the prepared baking pan, pressing it firmly to create an even layer. Bake for 10-12 minutes until set and slightly firm.
4. Prepare the Filling: In a medium saucepan, combine dark chocolate chips and heavy cream. Stir over low heat until the chocolate is fully melted and smooth.
5. Mix Filling Ingredients: Remove the chocolate mixture from heat and stir in vanilla extract. Allow it to cool slightly before adding eggs and sugar. Whisk until well combined.
6. Add Raspberries: Gently fold in the floured raspberries, being careful not to break them up too much.
7. Pour the Filling: Pour the chocolate-raspberry filling over the baked crust, spreading it evenly.
8. Bake: Place the pan back in the oven and bake for an additional 15-18 minutes or until the filling is set but slightly jiggly in the center.
9. Cool: Remove from the oven and allow to cool in the pan for about 15-20 minutes. Then transfer to a wire rack to cool completely.
10. Slice and Serve: Once cooled, use a sharp knife to cut into squares. Dust with powdered sugar if desired and top with extra raspberries.

These straightforward steps ensure that anyone can whip up these incredible bars with minimal effort.