Preheat oven to 350 degrees and line two cookie sheets with a silicone mat or parchment paper
Using a large bowl, beat the butter, oil, pumpkin, sugar, powdered sugar, vanilla and eggs until combined
In a medium bowl, whisk the flour, pumpkin pie spice, cinnamon, baking soda, cream of tartar and salt
Gradually beat in the dry ingredients into the wet until combined and a dough forms
Using a small ice cream scooper, or tablespoon, scoop out about 2 tablespoon of dough onto the cookie sheet
Using the back of the tablespoon or your thumb, make a indent into the center of the cookie