In small bowl, mix vanilla frosting and green food color until desired shade; frost cupcakes. Unroll fruit snack, and cut off 4-inch strips of desired colors to make masks on cupcakes. Place cut strip on cutting board. Starting about 1 inch from left side of fruit snack, use small sharp knife to cut small horizontal slits for eyes about 1 inch apart. Place candy eyes under slits in fruit snacks. Cut small horizontal slit in fruit snack on right side to form tie for mask. Place masks on cupcakes.