In a medium mixing bowl, combine creamer, brown sugar, coffee crystals, and chocolate pieces. Store mixture in a tightly covered container. Makes 2 cups mix (enough for 8 servings).
For each serving, pour 2/3 cup boiling water in a blender container. Add 1/4 cup of the mix. Cover tightly; blend until well combined and frothy. (Or beat with a wire whisk or electric mixer.) Pour into a mug. If desired, top with shaved chocolate.