Adapted from Cook’s Illustrated, November/December 2014 issue.
2/3 cup (4.7 ounces) sugar
6 ounces unsweetened chocolate, chopped fine
1 cup (3 ounces) unsweetened cocoa powder
½ cup (1 1/2 ounces) nonfat dry milk powder
5 teaspoons cornstarch
1 teaspoon vanilla extract
1/2 teaspoon fine salt
Process all ingredients in food processor until ground to powder, 30 to 60 seconds. Transfer to airtight container and store at room temperature.
To make one serving of hot chocolate, heat 1 cup of milk in a small saucepan over medium heat until it starts to steam and bubbles appear around the edge of the saucepan. Add 2 to 4 tablespoons of hot chocolate mix and continue to heat, whisking constantly, until simmering, 2 to 3 minutes longer. Pour the hot chocolate into a mug and serve. Of course, add whipped cream or marshmallows for best results.