According to Wookieepedia:

Hoth chocolate was a variant of hot chocolate containing Tauntaun milk, and a number of different spices mixed with cocoa and boiling water. Hoth chocolate was associated with the Wookiee Life Day.

We couldn’t find any Tauntauns to milk, so we went ahead and used oat milk since it’s what we had. But any type of milk will do.

For spices we went with vanilla and cardamom for a warm and cozy feeling. We also included both chocolate and cocoa powder for a rich, deep chocolate taste.

Hoth Chocolate [makes 2 large cups or 4 regular cups]

4 cups milk (or milk alternative)
1/2 cup chopped bittersweet or semisweet chocolate
1/4 cup unsweetened cocoa powder
1/4 cup granulated sugar
1/4 teaspoon pure vanilla extract
1/2 teaspoon cardamom
pinch salt

Combine milk, chocolate, cocoa powder, and sugar in a saucepan. Stir over medium heat until the chocolate has fully melted and the mixture is hot.
Stir in the vanilla and cardamom. Serve immediately.