Preheat oven to 350°.
Coat bottom of an 8-inch square baking pan with cooking spray (do not coat sides of pan).
Lightly spoon flour into a dry measuring cup; level with a knife. Combine flour, chocolate chips, soda, and salt in a bowl.
Combine sugars and remaining ingredients in a bowl; stir until well-blended. Add flour mixture, stirring just until blended. Spread batter in bottom of prepared pan. Bake at 350° for 25 minutes or until a wooden pick inserted in center comes out almost clean. Cool on a wire rack.