Preheat oven to 375°F.

Combine flour, soda, baking powder, and salt in a small bowl.

Beat butter, sugar, brown sugar, and vanilla in a large mixer bowl until creamy.

Add egg, beating well.

Gradually beat in flour mixture.

Stir in chocolate chips.

Drop by rounded tablespoon onto ungreased baking sheets.

Bake for 9-11 min. or until golden brown.

Cool on baking sheets for 2 min.; then remove to wire racks to cool completely.