Turn it into a pumpkin:
Cut each cake in half horizontally. Spread 3/4 cup of frosting on the bottom half of each cake & sandwich with the tops.
Transfer 1/2 cup of icing to a small bowl & tint with the green food coloring. Tint the remaining frosting orange. Place one cake, rounded side down, onto a serving platter. Spread the top with 1/2 cup orange frosting & sandwich with the remaining cake, rounded side up. Frost the entire cake with orange icing.
Spread the green frosting on the ice cream cone. Place the ball of aluminum foil into the center of the cake, and prop the ice cream cone, open side down, on top of it – angling a little to make a more realistic stem.
To serve, slice into the top layer first & when that’s gone, dig into the bottom layer.