Once your brownies are cool, you are ready to assemble your reindeer. Since your pan is lined with foil, simply lift the foil and brownies out of the pan. Remove the foil and place the “brick” of brownies on a cutting board.
Using a heart shaped cookie cutter, cut out the brownie hearts.
Place the powdered sugar and water in a ziplock bag. Knead with your hands until mixed well. Snip the end of the bag to create a small opening to pipe the frosting onto the brownies.
Add a dab of frosting to the eyes and attach to the brownies and do the same with the red sixlets to create a nose.
For the antlers, you can cut or break pretzels, or leave them whole and press them into the side of the brownie. I didn’t use any frosting because the brownies were chewy enough to keep the antlers in place.
One 9×13 brownie pan will make 18-24 reindeer brownies. It really depends on the size of your heart cutter. My cutter is about 2.5″ square.