2 tbsp melted butter
2 c miniature marshmallows
3 c semi-sweet chocolate chips
1 can creamy chocolate sweetened condensed milk
dash salt
1 1/2 tsp vanilla extract

In heavy sauce pan over low heat, melt chips with condensed milk, salt, butter and marshmallows. Remove from heat, stir in vanilla. Spread evenly onto wax paper lined 8-9 inch square pan. Chill 2 hours or until firm. Turn fudge onto cutting board. Peel off paper, cut into squares. Store covered in refrigerator.