Mix together butter, flour and powdered sugar with a large fork or pastry cutter.
When mixture is crumbly, press it into a 9 x 13 baking pan.
Bake for 20 minutes or until lightly browned.
Meanwhile, make the pumpkin pie filling:
Mix can pumpkin, eggs, sweetened condensed milk, eggs, pumpkin pie spice, salt and pepper together until well combined.
Pour over crust and bake for 20 minutes or until center is set.
Cool to room temperature and refrigerate until ready to serve.
Slice and top with sweetened whipped cream.