Making Chocolate Mochi can be a straightforward process if you follow these steps:

1. Mix Dry Ingredients: In a large bowl, combine the glutinous rice flour, cocoa powder, and granulated sugar.
2. Add Water: Gradually pour in the water while stirring to create a smooth batter.
3. Prepare the Steamer: Fill a pot with water and bring it to a boil. Prepare a steamer basket lined with parchment paper.
4. Steam the Mixture: Pour the chocolate batter into the steamer basket. Cover and steam for about 20 minutes, or until the mochi is cooked through.
5. Cool the Mochi: Remove the steamer from heat and let it cool for about 20 minutes.
6. Dust with Cornstarch: Sprinkle cornstarch on a clean surface to prevent sticking. Once cooled, transfer the mochi to the dusted surface.
7. Shape the Mochi: Use your hands to knead the mochi gently. Cut it into small pieces or shape it into balls.
8. Coat with Powdered Sugar: If desired, roll the mochi pieces in powdered sugar to prevent them from sticking together.
9. Chill (Optional): For a firmer texture, refrigerate the mochi for about 30 minutes before serving.

These steps will guide you through creating this incredible dessert with ease!