Chocolate Chip Fudge

1 can evaporated Milk
4 1/2 cups sugar
3 pkg chocolate chips
1/2 lb butter
3 cups nuts
1 tsp vanilla
18 oz marshmallows

Boil milk and sugar ten mins.  Stirring constantly.  Mix remaining ingredients in seperate bowl.  Then add milk and sugar mixture.  Beat and add nuts.  Form into rolls or drops.