Preheat oven 350.
Line cookie sheets with parchment.
Beat butter smooth.
Add oil and sugars to combine.
Add eggs and vanilla.
Once smooth, add dry ingredients to form a dough.
Chill 30 mins.
Scoop 3T. mounds onto sheets and use bottom of a measuring cup to press down a bit.
Bake 10-12 mins.
Cool before frosting.