Bake devils food cake mix in oblong pan, 13x9x2", as directed on package. Prepare creamy white frosting mix as directed on package or use Butter Cream Frosting. Frost cake.
Arrange pastel mint wafers for balloons in a cluster in upper corner of cake. Use shoestring licorice for balloon strings; bring all strings to one point in lower corner of cake. Insert candies in cake as desired.