Before you begin, place your metal bowl and whisk in the freezer to make sure it is very cold when you are ready to use.
In a large bowl, combine heavy cream, whole milk and all hot chocolate mix and whisk until completely combined and smooth. Keep whisking and the powder will eventually mix together and be completely smooth. Once mostly all of the powder is dissolved, pour into your ice cream maker and freeze according to manufacturer's instructions. I used my kitchen aid attachment and it took about 15 minutes. If you let it go too long it will be very thick, so don't over freeze it unless you want ice cream (which is equally delicious!).
While frozen hot chocolate is freezing, whip up your whipped cream. Take the metal bowl and whisk out of the freezer. Pour in heavy cream and whip until cream is stiff and soft peaks form. You can either do this by hand or with your mixer. Once the consistency is just right, add powdered sugar and vanilla and whisk again until fully combined.
Once your drink is done freezing, scoop it into mugs. Place whipped cream into a piping bag or zip lock bag and pipe whipped cream on top. Garnish with sprinkles or whatever you like. Best served immediately.