The warmth of hot cocoa provides a stark contrast to the cold and bleak post-disaster world in which Emily finds herself, symbolizing a rare moment of comfort.
In a saucepan, mix cocoa, sugar, and salt.
Add milk gradually, stirring continuously over medium heat.
Bring to a simmer, then remove from heat.
Stir in vanilla extract.
Serve hot, topped with marshmallows if desired.