Combine the cream, sugar, barley malt syrup, Cocoa Rouge, and salt in a saucepan and bring to a simmer.
Pour half of the cream mixture over the Organic 66% Cacao Semisweet Chocolate, then whisk until smooth.
Add the remaining cream mixture and vanilla paste, and emulsify the mixture with an immersion blender.
Cool the mixture over an ice bath and use when completely chilled or store in the refrigerator for future use.
To serve, combine 150g of the base with 150g of crushed ice in a drink blender.
Blend until smooth, then transfer to frozen glassware.
Top with fresh whipped cream and serve.