Weight Watchers Chocolate Marshmallow Fudge

Coat an 8x8-inch pan with cooking spray.
Stir together sugar, evaporated milk and margarine. Bring to a boil in sauce pan, reduce heat to medium-low and cook 3 minutes, stirring constantly.
Stir in chocolate and marshmallows. Remove from heat and stir until smooth.
Pour into pan and refrigerate until firm, about two hours. Cut into 36 squares and serve. (Leave fudge in refrigerator or freezer for a firmer consistency).
If you are following Weight Watchers, this has 3 points per serving.