1In a microwave-safe bowl, mix the rice flour, sugar, cocoa powder, and water until smooth.
Cover the bowl with plastic wrap, leaving a small gap for steam to escape.
Microwave the mixture on high for 2 minutes.
Stir the mixture, then microwave for another 1-2 minutes until the mochi is thick and slightly translucent.
Dust a clean surface with cornstarch and transfer the mochi onto it.
Allow the mochi to cool slightly, then dust your hands with cornstarch and knead the mochi until smooth.
Shape the mochi into small balls or desired shapes, dusting with more cornstarch as needed to prevent sticking.
Serve and enjoy your Chocolate Mochi!