¾ cup white sugar, or to taste
⅓ cup unsweetened cocoa powder
1 pinch salt
⅓ cup boiling water
3 ½ cups milk
¾ teaspoon vanilla extract
½ cup half-and-half cream
Combine sugar, cocoa powder, and salt in a saucepan. Add boiling water and whisk until smooth. Bring mixture to a simmer, stirring continuously to prevent scorching, and cook for 2 minutes.
Stir in milk and heat until very hot without boiling.
Remove from heat; add vanilla.
Add cream to each mug to help cool cocoa to drinking temperature then divide hot cocoa between 4 mugs.
Serve hot and enjoy!