Preheat oven to 350 degrees.
Place ice cream in refrigerator to soften. Grease a 12-inch pizza pan. In a medium bowl, mix the brownie mix, egg, oil and water; spread in pan. Bake for 17 minutes. Do not overcook. Cool completely.
Spread ice cream over brownie crust and drizzle with fudge from brownie box. Sprinkle with nuts and freeze for at least one hour before serving. To serve, make 12 mounds of whipped cream on top of brownie, near the edges. Top each with a cherry.
(This recipe was contributed as part of a "Cook of the Week" feature.)