Preheat the oven to 350 degrees F
In a large bowl, combine the brown sugar, butter, eggs and vanilla just until blended. Combine the flour, baking powder and salt; add to brown sugar mixture. Stir in chocolate chips.
Spread into a greased 13-in. x 9-in. baking pan and top with sprinkles.
Bake at 350° for 20-15 minutes or until a toothpick inserted near the center comes out clean. Cool on a wire rack. Cut into bars.Gluten Free
Use a gluten free flour mix. I personally used 3/4 cup corn flour and 3/4 cup corn starch as a replacement and it worked great. Also make sure you are using other gluten free ingredients (vanilla, sprinkles, etc)Dairy Free
Use a dairy free margarine and leave out the white chocolate chips. You can substitute an extra 1/2 semi sweet chocolate chips to replace. Ghirardelli semi sweet chocolate chips are dairy free.