Combine chocolate chips, cream, and sugar in a microwave-safe dish and cook in the microwave for 1 minute. Stir, then cook for 30-second intervals until chocolate is melted and mixture is smooth. Mix in vanilla and salt until well incorporated. Cover the bowl and refrigerate for at least 2 hours.
Scoop chocolate mixture onto a parchment-lined baking sheet using a large cookie scoop. Freeze until solid, 8 hours to overnight.
Shape frozen scoops into balls and roll in cocoa powder. Store in a freezer-safe container until ready to use.
