add the butter & marshmallows in a bowl and melt them together. This can be done in the microwave or on the stove top.
add in Rice Krispies and mix thoroughly
spread the mixture into a greased pan with a greased spatula.
allow mixture to cool (about 30 minutes)
use ghost shaped cookie cutter to cut in shapes
apply vanilla icing to top of treat
add a candy eyes
use black writing gel for mouth
serve & enjoy!