Steps

1. Preheat oven to 350 °F.
2. Toast pecans lightly 5 minutes until barely fragrant. Remove and cool.
3. Cream together butter, sugars, and salt well until fluffy, at least 5 minutes in stand mixer. Add vanilla extract and mix through.
4. Pulse together pecans and flour in food processor until pecans are in very small pieces, 8 1-sec pulses.
5. Stir in flour mixture until a firm dough forms.
6. Form into 1-tbs balls, then flatten with the bottom of a glass, dipping it in flour every couple cookies. Or place an untoasted pecan half on each ball and use it to push it flat.
7. Bake at 350 °F for 20 minutes. Remove and cool.