In a small bowl whisk until smooth, 1/4 cup milk and cornstarch set aside.
Sift the cocoa into a medium bowl then add the sugar and whisk together, set aside.
In a small/medium pot heat 3/4 cups + 1 tablespoon milk until boiling reduce heat to low, start whisking and add the milk/cornstarch mixture then add the cocoa mixture slowly while continually whisking until smooth add the chopped chocolate and whisk for approximately 3 minutes. Serve immediately. Enjoy!
Be sure to watch the Video at the top of the post!