Instructions: Prepare the Crust: In a medium bowl, combine the flour and salt.Add the cold, cubed butter and use a pastry cutter or fork to cut the butter into the flour mixture until it resembles coarse crumbs.
Prepare the Filling: In a large bowl, combine the molasses and hot water, stirring until the molasses is dissolved.
Assemble the Pie: On a floured surface, roll out the chilled dough into a 12-inch circle. Fit it into a 9-inch pie dish and trim any excess dough, leaving about a 1-inch overhang. Fold the overhang under itself and crimp the edges to seal.
Bake the Pie: Place the pie in the preheated oven and bake for 35-45 minutes, or until the filling is set and the crumb topping is golden brown.
Cool: Allow the pie to cool completely on a wire rack before serving. This helps the filling set and makes slicing easier.
Serving: Serve the blackberry pie warm or at room temperature, optionally with a scoop of vanilla ice cream or a dollop of whipped cream. Enjoy!