Peanut Butter Cookie Bars

I found these on Sweet Treats, and they were good.  I would try to press the chocolate chips in a little bit because I found them dropping off as I ate them.  I would also say I prefer blonde brownies, but these are healthier I think.  Still very delicious and very quick!

1/2 c. butter, melted
1/2 c. granulated sugar
1/2 c. packed light brown sugar
1 egg
1/3 c. peanut butter
1/2 tsp. vanilla extract
1/2 c. all-purpose flour
1/2 c. whole wheat flour
1/2 tsp. baking powder
1/4 tsp. salt
1 c. quick oats
chocolate chips to sprinkle on top

Stir together melted butter and sugars until thoroughly combined. Add egg and mix well. Stir in peanut butter and vanilla extract. Add flour, baking powder, and salt; stir to combine. Stir in oats. Press mixture into a 9×13 pan (lightly greased). Bake at 350 degrees for 10 minutes. Remove from oven and sprinkle chocolate chips on top. Return to oven until golden brown and baked through, about 8-10 more minutes.