In a large saucepan, combine the cream, cocoa, malt powder, sugar, and salt. Whisk to combine and then heat over medium heat, stirring continually, until it comes together and begins to steam and simmer. (If you wish, you may increase the heat, but continue stirring non-stop. Do not step away at this point.)
Remove from the heat and immediately add the chocolate. Whisk until the chocolate has completely melted. Stir in the milk and vanilla. Cool and refrigerate for at least 4 hours or overnight until completely cold.
Process according to your machine’s instructions. While the ice cream is churning, slice in half or roughly chop the malted milk balls, leaving plenty of bigger pieces.
When the ice cream is almost ready, add the candy pieces and finish churning. Serve immediately for soft-serve ice cream or transfer to a freezer-safe storage container and freeze until ready to serve.