This sounded so damned wonderful that I had to share it--from NPR's web
page--

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Serendipity 3 Frrrozen Hot Chocolate

6 half-ounce pieces of a variety of your favorite chocolates

2 teaspoons of store-bought hot chocolate mix

1 1/2 tablespoons of sugar

1 1/2 cups of milk

3 cups of ice

Whipped cream

Chocolate shavings

Chop the chocolate into small pieces and place it in the top of a double
boiler over simmering water, stirring occasionally until melted. Add the
hot chocolate mix and sugar, stirring constantly until thoroughly
blended. Remove from heat and slowly add 1/2 cup of the milk and stir
until smooth. Cool to room temperature.

In a blender place the remaining cup of milk, the room temperature
chocolate mixture, and the ice. Blend on high speed until smooth and the
consistency of a frozen daiquiri. Pour into a giant goblet and top with
whipped cream and chocolate shaving.