Preparation

Pour the orange juice, cocoa and flour into a blender. Turn the machine on; let run for 10 seconds or until well mixed. Empty contents of blender into a small saucepan and stir smoothly over low heat.
Beat with a fork or wire whisk until well blended.

Add sugar and heat the mixture over medium-low heat, stirring occasionally, until hot. Pour into cups and serve. For garnish, add marshmallows, whipped cream or a Florida orange slice.