01 -
Combine milk, chocolate chips, cocoa powder, brown sugar and salt in a saucepan over low-medium heat.
02 -
Whisk occasionally until chocolate melts and mixture is warm and steamy but not boiling, about 10 minutes.
03 -
Remove from heat and stir in vanilla extract.
04 -
Pour into mugs and top with whipped cream or marshmallows. Serve hot.