Using an electric mixer, beat margarine in a large mixing bowl.
Gradually add brown sugar replacement, beating until light and fluffy.
Beat in egg yolk, vanilla, caramel flavoring, and salt.
Stir in flour.
Chill for at least 2 hours.
Press dough from cookie press onto ungreased cookie sheets, following press manufacturer's directions.
Bake at 350°F (175°C) for 8 to 10 minutes.
Move to cooling racks.