Put the chocolate in a medium-sized heatproof bowl and melt it over a double boiler until smooth and fluid. Set aside to cool.
Ice Cream Maker
Mix all of the ingredients in a medium mixing bowl until combined.
Add the mixture to the frozen bowl of an ice cream maker (if it has lumps, you can strain it through a fine sieve) and churn until it thickens to soft serve consistency.
Transfer the mixture to a freezer-safe container and freeze for two to three hours before serving.
No Churn Method
Mix the cooled chocolate with the condensed milk. Add the cocoa powder and salt and mix to combine. Slowly mix in the cream until combined.
If the mixture has lumps, you can strain it through a fine sieve. Beat the mixture using a mixer or food processor fitted with the chopping blade until the mixture thickens to a whipped cream consistency.
Transfer the mixture to a freezer-safe container, cover, and freeze three to four hours before serving.