Step #1 Preheat oven to 350°F
Line a 12-inch round pizza pan with foil wrap; grease foil wrap.
Step #2 Prepare brownie mix as directed on package, using the water, oil & egg; spread in foil wrap-lined pan.
Step #3 Bake for 30 to 34 mins; do not overbake; cool completely.
Step #4 Frost brownie with vanilla frosting.
Step #5 Make a spider web by piping the decorating icing in a spiral pattern, using the round tip; start the spiral pattern at the outside & keep the lines about ¾ inch apart; using a toothpick or knife, draw lines outward through frosting starting at center of brownie.
Step #6 To make spider, rounded side up, cut gumdrop crosswise into thirds; place smaller rounded end on brownie, to form body of spider; cut 4 thin strips from each remaining gumdrop slice to form legs; Place next to spider body.