Creamy Hot Chocolate (Polar Express)

1 14 oz can Eagle Brand
1/2 c cocoa or 1 1/2 c-2c chocolate chips
1 1/2 tsp vanilla extract
1/8 tsp salt
6 1/2 c hot water
mini marshmallows (optional)

In large saucepan over medium heat, combine sweetened condensed milk, cocoa, vanilla, and salt. Mix well. Slowly stir in water. Heat through, stirring occasionally. Do not boil. Top with marshmallows (optional). Store covered in the refrigerator.