In a medium to large saucepan, melt the butter over low heat.
Add the marshmallows and stir until completely melted.
Stir in enough food coloring to make the marshmallows very red and remove from heat.
Add the Rice Krispies cereal and stir until cereal is well coated.
Using butter or cooking spray, lightly spray a 9 x 9 pan.
Butter, spray your hands or use wax paper to press the mixture evenly and firmly into the pan. Allow to cool then cut into 6 bars
For the white icing:
In a large bowl, cream the butter and add the vanilla. Then mix in the powdered sugar one cup at a time. Beat in the milk, mixing until fluffy.
Transfer the icing to the corner of large size zipper bag, try to minimize the trapped air and close. Clip a small piece off of the corner to pipe.
Pipe icing onto back (flat side) of vanilla wafer to act as glue and place on Krispie bar.
Pipe a dot of icing onto the back of each eye and the "m" side of the M&M and place on vanilla wafer.
Cut a 1.5 - 2 inch length of fruit roll and fold in V shape to act as hat. Place hat above wafer on the bar.
Pipe a white icing ball on the tip of the hat and pipe a band across the edge of the hat and a beard along the bottom of the cookie.
Allow to set.
