Beat butter until soft with a mixer. Add sugar, vanilla, and pecans. Carefully add flour and blend well.
Coat hands with flour. Use a teaspoon scoop or a teaspoon and shape into cherry-size and place on a parchment-lined or greased cookie sheet.
Bake at 300 degrees F for 15-20 minutes.
(These should be light in color. Do not brown!) While cookies are still quite warm, roll them in confectioner’s sugar. When cool, roll in confectioner’s sugar again.