Five minute chocolate fudge

INGREDIENTS:
2 Tbsp butter
2/3 cup evaporated milk
1 2/3 cups sugar
1/2 tsp salt
2 cups miniature marshmallows
1 1/2 cups semi-sweet chocolate chips
1 tsp vanilla
1/2 cup chopped pecans or walnuts

PREPARATION:
Combine butter, milk, sugar, and salt in a saucepan over medium heat.
Bring to a boil; cook 4 to 5 minutes, stirring constantly.
Remove from heat. Stir in marshmallows, chocolate, vanilla, and nuts.
Beat for about 1 minute, or until marshmallows melt and mixture is thoroughly combined.  
Pour into an 8-inch square buttered pan and cool. Cut fudge into squares.