2 1/2 c. sugar
1/4 c. butter
1 sm. can (3/4 c.) evaporated milk
3/4 jar marshmallow fluff
3/4 tsp. salt
3/4 tsp. vanilla
1 lg. (12 oz.) pkg. chocolate chips

Combine first 5 ingredients. Stir over low heat until blended. Bring to a 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 chips and vanilla until chocolate is melted. Then turn into a buttered 9x9 inch pan and cool.