1/4 cup sugar
3/4 cup unsweetened cocoa
1 1/2 cups water
2 ounces bittersweet chocolate, chopped
2/3 cup fresh orange juice
2 tablespoons light corn syrup
2 teaspoons grated orange zest
Combine sugar and cocoa. Whisk in water. Bring to boil in a saucepan, whisking constantly for 3 to 4 minutes.
Reduce heat, and add remaining ingredients. Stir to melt chocolate. Refrigerate 1 hour or more.
Make sorbet in an ice cream maker.