• Place your cupcakes into the stiff white wrapper
• Add powdered sugar to white frosting and mix to thicken the frosting
• Frost the cupcakes with thickened vanilla frosting
• Mickey's Shorts - Using the width of your cupcake as your guide for the width - cut a piece of the fruit roll-up to match the cupcake width
  
• Cut that into the shape of a semi-circle
• Once you place the fruit roll-up onto the cupcake - you can trim the edges, if needed
• If you want to make the red a little more vivid, you can cut one more semi-circle and add it to the top of this one
  
• Now, with your leftover pieces of a red fruit roll-up, trim a couple of thin rectangle pieces for Mickey's straps
• Add those to the shorts
• Cut the marshmallows in half and use the most round looking pieces  for Mickey's white buttons
• Glue those on with frosting

Mickey's Ears:

• If the frosting is thick enough, then you'll simply have to push them into the cookie, just above the suspenders
• You could also add some frosting to the bottom of the cookies for extra support
• Toothpicks can also be inserted above the suspenders to hold the cookies in place (just be sure to let your guests know that toothpicks are hidden in the cupcake so they can remove them before eating the cupcake)