Grab a medium saucepan and add the sugar and cocoa powder. Whisk them together. Then pour in the half-and-half in and whisk it all up. Turn on the heat to medium-high, whisking until the cocoa, sugar, and half-and-half begin to boil and are completely combined.

Stir in milk and bring to a simmer. Simmer the hot chocolate for just a few minutes, then remove from heat.

Pour into mugs and top with marshmallows, whipped cream, or both – if you’re feeling daring. Enjoy!