Heat oven to 350. Line sheets w parchment

With the stand mixer cream together butter and powdered sugar. Beat in the vanilla, then add the flour and pecans and beat on low until fluffy and light.

Scoop 35 g portions and roll into smooth balls. Bake 14 minutes until set and the bottoms are slightly browned. Let cool 10 minutes then roll in powdered sugar. Return to baking sheet. Once completely cooled, roll in powdered sugar a second time