Making Italian hot chocolate is straightforward when you follow these simple steps:

1. Combine Dry Ingredients: In a small bowl, whisk together the cocoa powder, cornstarch, sugar, and salt to ensure there are no lumps.
2. Heat the Milk: In a medium saucepan, heat the milk over medium heat. Stir occasionally to prevent it from scorching.
3. Add Dry Mixture: Once the milk is warm (but not boiling), gradually whisk in the dry mixture until well combined. Continue to heat, stirring constantly.
4. Add Chocolate: When the mixture begins to steam, add the chopped dark chocolate. Keep stirring until the chocolate is fully melted and the mixture is smooth.
5. Thicken the Mixture: Continue to cook for an additional 2-3 minutes, or until the hot chocolate thickens to your desired consistency. It should feel reminiscent of a rich chocolate pudding.
6. Flavor It: Remove from heat and stir in the vanilla extract for extra flavor.
7. Serve Immediately: Pour the hot chocolate into mugs and top with whipped cream or marshmallows, if desired.

This process will guide you in making a delicious cup of Italian hot chocolate that is sure to impress everyone who tries it.