Heat oven to 375°F.
Mix flour, baking soda and salt. Beat butter, sugars and pumpkin spice in large bowl with mixer until light and fluffy. Add egg, pumpkin and vanilla; mix well. Gradually beat in flour mixture until blended. Stir in chocolate and nuts.
Drop by heaping tablespoonfuls, 2 inches apart, onto baking sheets.
Bake 12 to 13 min. or until lightly browned. Cool on baking sheets 1 min.; remove to wire racks. Cool completely.