Moist Low-Fat Brownies
["vegetable cooking spray", "3/4 c. semi-sweet chocolate chips", "1 (14 oz.) can Eagle Brand fat-free sweetened condensed milk", "1/3 c. unsweetened cocoa", "4 egg whites", "1/3 c. unsifted flour", "1 tsp. baking powder", "1 tsp. vanilla extract"]
["Preheat oven to 350\u00b0.", "Spray 13 x 9-inch baking pan with cooking spray."]
["vegetable cooking spray", "semi-sweet chocolate chips", "condensed milk", "unsweetened cocoa", "egg whites", "flour", "baking powder", "vanilla extract"]