PREHEAT oven to 375° F.
COMBINE flour, ground pecans, baking powder, baking soda and salt in medium bowl. Beat butter and vegetable shortening in large mixer bowl on medium speed for 30 seconds. Add granulated sugar, brown sugar, eggs and vanilla extract; beat until well combined. Gradually beat in as much flour mixture as possible. Stir in remaining flour mixture, morsels and nuts. (Recipe may be made ahead up to this point. If desired, cover and refrigerate dough for 4 hours or up to 3 days.) Drop by rounded teaspoon onto ungreased baking sheets.
BAKE for 10 minutes or until golden brown. Cool on baking sheets for 2 minutes; remove to wire racks to cool completely.