First, Preheat your oven to 350 degrees.
Lightly dust a surface with flour and roll out your dough, place in a 9 inch pie pan, and cut off the excess.
Place pumpkin in a large bowl. Add the butter, and mix well. Mix in brown sugar, eggs, milk, pumpkin pie spice, and vanilla extract in mix with an electric mixer. (or if you prefer, you can put it all in a blender like I did)
Pour filling into your unbaked pie crust.
Then place in the oven, bake for 60 minuets, let cool, and enjoy!