Recipe Time! Blondies as told by the book 500 cookies  What you’ll need (to fill an 8×8 brownie pan) 1 cup all-purpose flour ¾ tsp baking powder pinch of salt ½ cup (1 stick) unsalted butter 1 cup light brown sugar 1 egg 1 tsp. vanilla extract ½ 11oz chocolate chips. (or whatever your little heart desires!…