Take a microwave safe bowl and add the rice flour, cocoa powder, sugar, cornflour to it. Give it a mix using a fork or chopsticks. Add the melted butter and milk and mix again to form a smooth batter.
Cover the bowl with a plate and microwave for 3 mins – stirring after every one minute. The mixture should look thick, combined and sticky.
Let the mixture come to room temperature. Refrigerate it then, for 10-15 mins.
Dust some cornflour on a clean surface and place the cooled dough on it. Roll out the mixture into a smooth dough and divide it equally into 4-5 portions Roll out each portion into a circle.
Take a small bowl or ramekin and place the rolled-out dough over it. Make sure the dough is larger in circumference than the ramekin and forms a cavity in centre.
Scoop some chocolate ice cream in the centre and carefully close the mochi dough into a small round ball.
Cut off the excess dough and seal the edges properly.
Recipe by Bake with Shivesh at https://bakewithshivesh.com/chocolate-mochi/