Combine sugar, margarine, vanilla, rum extract and egg; beat until light and fluffy.
Lightly spoon flour into measuring cup; level off.
Add flour and nutmeg; mix well.
Cover dough with plastic wrap; refrigerate about 45 minutes for easier handling.
Heat oven to 350ºF.
Divide dough into 12 pieces.
On floured surface, shape each piece of dough into long rope, ½” in diameter
and about 15” long.
Cut into 3” lengths; place on ungreased cookie sheets.
Bake for 12 to 15 minutes or until edges are light golden brown.
Immediately remove from cookie sheets. Cool.
In small bowl, combine all frosting ingredients except nutmeg, adding enough half-and-half for desired spreading consistency.
Spread on top and sides of cookies. If desired, mark frosting with tines of fork to resemble tree bark.
Sprinkle light with nutmeg.
Let stand until frosting is set before storing