Preheat
the oven to 350 degrees. Spray a 9 x 13-inch baking pan with non stick pan
spray.

In
a small sauce pan melt the butter. Put the light brown sugar in a large bowl,
add the butter, and stir to combine. Cool to room temperature. Beat in the
eggs and vanilla.

In
a medium bowl, whisk together the flour, baking powder, and salt. Add the
flour mixture into the wet ingredients, mixing just until a smooth batter is
formed. Stir the chocolate chips into the batter

Transfer
the batter to the prepared pan. Bake until lightly browned and toothpick
inserted in the center come out clean, about 20 minutes.

Cool the blondies in the pan slightly before inverting
them onto a cooling rack. Cool completely. Cut into squares and serve.