For the brownies: follow the directions on the brownie box, except omit the water (add the eggs and oil) but no water. Then add the can of cherry pie filling and chocolate chips to the brownie batter. Spray a 9x13 greased pan and pour the batter into the pan. Bake according to the brownie directions on th box (you might need a few more minutes since it is so moist). Once the brownie is baked, cool until chilled and ready to frost.
For the frosting: cream the cream cheese and butter until smooth. Add the extract and powdered sugar (about 1-1 1/2 lbs.). Add maraschino cherry juice and more powdered sugar until the frosting is a soft and smooth texture. Once the brownies are cool, frost with the frosting.