Frozen Hot Chocolate
In a small saucepan, whisk together sugar and cocoa powder.
Set aside 2 tablespoons of the 2 ¾ cups milk.
Whisk in enough of the remaining 2 ¾ cups milk to make a paste.
Whisk in the remainder of the 2 ¾ cups milk.
Heat and stir over low heat until sugar is dissolved.
Pour chocolate mixture into clean ice cube trays. Cover and freeze for 6 hours to overnight.
Run hot water on bottom of ice cube trays to help release chocolate cubes.
Place chocolate cubes in a large food processor.
Add the reserved 2 tablespoons milk.
Cover and process until mixture is smooth and lightened in color.
To serve, spoon ½ cup of the chocolate mixture into each of eight 6-ounce glasses.
Using the 1 cup milk, spoon 2 tablespoons to ¼ cup of the milk on top of chocolate mixture in each glass; stir slightly.
If desired, garnish with marshmallows or shaved chocolate.