Preheat oven to 350 degrees.
Spray 9" x 13" non-stick cake pan with cooking spray.
Mix together first 5 ingredients.
Add chocolate chips.
Spread batter into the pan.
Bake for 20-25 minutes or until done. Stick a toothpick into bars close to the middle and remove it. When toothpick comes out clean, remove bars from oven. Let bars cool, and then cut them into squares.