Preheat oven to 350°F. Line 8-inch square baking pan with foil. Spray foil with no stick cooking spray. Mix flour, cinnamon, baking powder and salt in medium bowl. Set aside.
Mix brown sugar, butter, egg and vanilla in large bowl until well blended. Add flour mixture; mix just until moistened. Stir in chocolate chips and pecans. Spread in prepared pan.
Bake 20 to 22 minutes or until toothpick inserted in center comes out almost clean. Cool in pan on wire rack. Cut into 12 bars.