In a large bowl, whisk together the flour, baking powder and salt. Set aside.
3
Melt the butter and add the brown sugar, stirring until smooth. Allow the mixture to cool slightly. Add the eggs one at a time, beating well after each addition, then stir in the anilla. Add the flour misture, then the chocolate chips. Scoop the batter into the pan.
4
Bake the bars for 30 to 35 minutes, until their top is shiny and golden. Don''t overbake, or the bars will be dry; a cake tester inserted in the center will not come out clean. Remove the bars from the oven, and allow them to cool to room temperature before cutting. Yield 24 bars.