HEAT oven to 325°F.
COMBINE flour and baking soda. Beat butter and sugars in large bowl with mixer until light and fluffy. Blend in coffee, egg and vanilla. Gradually beat in flour mixture until well blended. Stir in chocolate chunks and nuts. Refrigerate 30 min.
ROLL dough into 60 (1-inch) balls; place, 2 inches apart, on baking sheets.
BAKE 10 to 12 min. or until golden brown. Cool on baking sheet 1 min. Remove to wire racks; cool completely.