2-1/2c. sugar 3/4 jar (7½ oz. size) marshmallow fluff*
1/4 c. margarine 3/4 tsp. salt
3/4 c. canned milk 1 tsp. vanilla
1 pkg. (6 oz.) chocolate chips
Combine sugar, margarine, milk, marshmallow, salt. Stir over low heat until blended.
Bring to boil over moderate heat, being careful not to mistake air bubbles for boiling.
Then boil slowly, stirring constantly, for 5 minutes.
Remove from heat. Stir in chocolate and vanilla until chocolate is melted. Turn into a buttered 9x9" pan. Cool. Cut.
*Can substitute 1/2 lb. (32 large) marshmallows.