1Make and bake brownie mix as directed on box for 13x9-inch pan, using water, oil and eggs. Cool in pan on cooling rack 1 hour. Trim 1/2 inch from all edges. Cut into 6 rows by 4 rows. Cut brownies into broom shapes; insert 1 pretzel stick 1/4 inch into top of narrow end of cut brownie.
2In microwavable bowl, microwave yellow candy melts uncovered on Medium (50%) 1 minute, then in 15-second intervals, until melted; stir until smooth. Spoon melted candy into resealable food-storage plastic bag; seal bag. Cut off small corner of bag; squeeze bag to pipe thin strands onto brownies to look like bristles. Use red icing to make band. Refrigerate 30 minutes or until set.