Preheat the oven to 350 degrees F. Lightly grease a 9 by 13-inch baking pan.
Sift together the flour, baking powder, and salt in a small bowl and set aside.
In a medium bowl add the brown sugar and butter with an electric mixer mix until cream.
Adding one egg at a time mix each egg until combined
Mix in the vanilla.
Add the flour mixture and mix until well blended.
Mix in the chocolate chips.
Pat the dough into the prepared pan and place in the preheated oven.
Bake for 20 to 25 minutes or until the bars are golden brown over top.
Remove from the oven and cool on a cooling rack.