The last time I was in New York, my best friend and I planned to go to Serendipity 3. There was a two-hour wait when we got there mid-afternoon, and we decided we didn't feel like waiting that long, even for the famous frozen hot chocolate. It was the middle of winter but I still wanted to try it because I always seem to like drinks better in their frozen form. Having still never tried frozen hot chocolate, last week I decided to make my own. I don't know what Serendipity's tastes like, but this one was pretty good!
Frozen Hot Chocolate
3 Tbsp sugar
3 Tbsp hot cocoa mix
2 Tbsp unsalted butter
1/3 cup semi-sweet chocolate chips
1/3 cup white chocolate chips
12 oz can evaporated milk, divided
4 1/2 cups ice
Combine sugar, hot cocoa mix, and butter in the top of a double boiler that is set over gently boiling water. Stir often until melted and a smooth paste forms. Add semi-sweet and white chocolate chips; stir. When chips begin to melt, slowly stir in 1/2 cup evaporated milk. Stir until smooth. Cool to room temperature.
Combine the chocolate base mixture, the remaining evaporated milk, and the ice in a blender (can be done in batches) and cover. Blend until smooth. Serves 4.
source: recipe from tasty kitchen