In medium microwave-safe bowl, place frosting from one container. Microwave on High in 30 second intervals, stirring until smooth and pourable. Quickly spoon about 1 tablespoon spoon frosting over each of 24 mini cakes, covering tops and letting frosting drip over sides. Reheat frosting as needed, if necessary. Repeat with remaining frosting and mini cakes. Let stand about 30 minutes or until frosting is set. Decorate with edible fresh flowers and mint, if desired. Store loosely covered.