Preheat oven to 350* F. Spray a 13x9-inch pan with cooking spray and set aside.
In a small bowl, whisk together the flour, baking powder and salt.
In a large bowl, combine brown sugar, butter, eggs and vanilla.
Stir flour mixture to brown sugar mixture. Add chocolate chips and stir to combine.
Spread into prepared baking pan. Bake for 15 to 20 minutes, or until a toothpick inserted in the center comes out clean. Cool on wire rack and cut into squares.
Recipe by Alida's Kitchen at https://www.alidaskitchen.com/2013/09/25/chocolate-chip-cookie-bars/