Make this cake for the next slumber party at your house, and you're sure to be a hit with the kiddies! It's easy to decorate, so do your own thing and be sure to add as many sleeping Twinkie bodies as you have at your slumber party!
Preheat oven to 350 degrees F. Coat a 9"x13" baking pan with nonstick cooking spray. Place 1 cup cake batter in a small bowl and stir in green food color. Mix well. Pour remaining batter into baking pan. Drop colored batter by spoonfuls into batter in baking pan and swirl with a knife to create a marbled effect.
Bake according to package directions. Cool completely then invert onto a serving platter. In a medium bowl,combine one container of frosting with remaining 4 drops green food color. Mix well. Lightly frost entire cake with green frosting then heavily frost top one-third of cake lengthwise with remaining green frosting.
Cut Twinkies in half lengthwise and place top halves on lightly frosted cake section, slightly overlapping heavily frosted section. Frost Twinkies and bottom two-thirds and sides of cake with remaining container of cream cheese frosting to look like a blanket that covers the Twinkies (the "bodies").
Place a flattened marshmallow to look like a pillow above each Twinkie on green frosted part of the cake. Decorate wafers with decorative icing to make hair,eyes and mouths. Attach decorated wafers to marshmallow pillows with leftover frosting. Using decorative icing,make a ruffle around edges of blanket. Sprinkle blanket with decorative sprinkles. Serve.