2 c. sugar
2/3 c. evaporated milk
16 lg. marshmallows
1 (6 oz.) pkg. semi-sweet chocolate chips
1/4 tsp. salt
1/4 c. butter
1 tsp. vanilla

Combine sugar, evaporated milk, marshmallows and salt. Cook and stir until melted. When bubbles cover the entire top surface, boil and stir over medium heat for 5 minutes. Remove from heat. Beat in butter, chocolate chips and vanilla until melted. Spread in buttered 9 inch pan until chilled.