My dear bro-in-law requests these cookies. They freeze well and you can pull them out 1, 2, 3 or however many at a time. They are also great seasonal cookies because you can use Christmas, Easter, or Valentine's Day M&M's.
Click here for the stolen recipe.
My substitutions: I halved the recipe and then used 1/2 cup of peanut butter instead of 1/2 cup of margarine.