In a large bowl, mix together flour, sugar, and salt. Cut Challenge butter into small cubes, then work butter into flour mixture using a pastry blender or large forks until it resembles a corse meal.
Pour in 3 tablespoons vodka, then mix everything together using your hands. Work quickly as to not melt the butter. If dough is too dry, add in another tablespoon of vodka. Form dough into disk and wrap with plastic wrap. Place in fridge for at least 1 hour, but up to 2 days.
make the pie
Preheat oven to 375°F. Grease a pie plate with butter.
Over a large work surface, roll out your pie disk into a large circle big enough so that it will drape over the edges of your pie plate (i.e. if your pie pan is 9 inches, roll it out to 11 inches). Fit it into pie plate by gently patting it onto the edges of the pan. Tuck the pie edges under themselves, then use your fingers to create a fluted pattern (you can look up online how to make it look extra pretty!). Place in fridge while you make your filling.
In a large bowl, combine pumpkin puree, evaporated milk, eggs, spices, flour, bourbon, and orange zest. Whisk until well combined.
Remove pie crust from fridge and pour in pie filling. Carefully place pie into heated oven and cook for 50 minutes. Once cooked, remove from oven and allow to cool completely in fridge, about 4 hours.
make the pecan topping
In a saucepan over medium heat, melt maple and brown sugar until it bubbles. Add in butter, stirring constantly for 2-3 minutes. Add in pecans and coat completely with mixture. Cook for 4-5 minutes more, until the pecans have absorbed most of the sugar and begin to look sticky.
Remove from heat and place on parchment paper to cool. Once pie is cooled completely, top with maple pecans!