Drain the soft tofu using a sieve.
Put the soft tofu in a bowl and mash it well.
Add cocoa powder and sugar to the mashed tofu and mix.
Add heavy cream and stir until smooth.
Melt the chocolate using a double boiler.
Add the melted chocolate to the tofu mixture and mix well.
Pour the mixture into an ice cream container and freeze for at least 3 hours.
Once fully frozen, scoop and serve.