Once the milk is warm (not boiling) add sugar, cocoa powder, milk chocolate morsels, and salt.
Use a spoon or a whisk to stir occasionally. Once the chocolate morsels have completely dissolved, turn off heat.
Add vanilla extract and mix well.
Serve hot with whipped cream or marshmallows.
Notes
How to store
If you find yourself with more hot chocolate than you can possibly consume, simply pour the left-over hot chocolate into an airtight container and store it for up to 3 days in the fridge.To reheat transfer to a small saucepan and warm over medium heat until heated through.