2 tbsp cocoa powder
1 cup granulated sugar
2 cups half and half
2 cups milk, divided
splash of vanilla
Place the cocoa powder and sugar in a medium saucepan; mix together. Turn heat to medium-high. Mix in 1/2 cup milk (it’s okay if the mixture is lumpy).
Stir until mixture bubbles. Allow to boil for a minute or two, stirring continually, until no longer grainy.
Mix in the remaining milk and half and half. Add the vanilla. Continue to stir until hot chocolate reaches desired warmness. Serve immediately.
Source : allrecipes.com