PREHEAT oven to 375º F.
COMBINE flour, salt and baking soda in small bowl. Beat butter, sugar, Nesquik and vanilla extract in large mixer bowl until creamy. Add eggs one at a time, beating well after each addition. Gradually beat in flour mixture. Drop by rounded tablespoon onto ungreased baking sheets.
BAKE for 8 to 10 minutes. Cool on baking sheets for 2 minutes; remove to wire racks to cool completely.