For the crust

1. Mix dry ingredients. In the bowl of an electric mixer, whisk together all-purpose flour, cake flour, salt, and sugar.
2. Cut in butter. Add the butter and shortening, and mix on low until mixture resembles coarse crumbs with some roughly pea-size butter lumps.
3. Add water. Drizzle 3 tablespoons ice water evenly over the mixture and mix on low until incorporated. Squeeze a small handful together. If it doesn’t hold together, add more ice water, ½ tablespoon at a time, mixing until just incorporated, then test again.
4. Gather together. Gather dough together into a ball, then flatten into a ½-inch thick disk. Wrap dough in plastic and chill, until firm, about 1 hour.

For the topping

1. Crumble and mix. Crumble the cookies with your hands into a small bowl. The pieces should be about ¼-inch chunks. Toss with the almonds; set aside.

Pre-bake the crust

1. Prep oven. Heat oven to 375 degrees F.
2. Roll out. Remove dough from refrigerator and roll out on lightly floured surface to a 12-inch round. Transfer dough to a 9-inch tempered glass pie plate. Trim excess dough, if necessary, leaving a ½-inch overhang, then fold overhang under pastry and press against rim of pie plate to reinforce edge.
3. Blind bake. Line the crust with parchment or foil and fill with pie weights. Place the pie pan on a baking sheet and bake for 15 to 17 minutes. Remove foil and weights. Return crust to the oven and bake until the crust just begins to brown, pressing with the back of a fork if the crust bubbles, about 5 minutes longer. Remove crust from oven and set on cooling rack.
4. Reduce heat. Reduce oven to 350 degrees F.

For the filling

While the crust is baking, make the filling. 

1. Process pumpkin. Scrape pumpkin purée into a food processor fitted with metal blade attachment. Process 15 seconds; scrape down sides and process 15 seconds more.
2. Add. Pulse in brown sugar, spices and salt until combined. Pulse in eggs one at a time until blended, scraping down sides as necessary. Pulse in cream and liqueur. Finish processing for 5 seconds to smooth out the mixture.
3. Fill and top. Pour filling into pre-baked crust. Sprinkle topping evenly over filling.
4. Bake. Bake pie for 50 to 55 minutes, or until filling is set around edges and quivers in the center when you gently shake the pie dish. Cool on a rack.