Have six 4- to 6-oz. ramekins or teacups ready for pouring.
Heat heavy cream in a small saucepan or microwave until just boiling. Remove from the heat and whisk in cocoa powder until smooth. Add the bitter chocolate, butter, sugar, vanilla extract, and salt. Whisk until the chocolate and butter are melted and the mixture is smooth.
1 ¾ cup heavy cream, 2 Tbsp unsweetened Dutch Process cocoa powder, 8 oz chocolate, 4 Tbsps unsalted butter, 2 Tbsps granulated sugar, 1 tsp pure vanilla extract, pinch salt
Pour the mixture into the ramekins or cups. Depending on the size of the ramekins, they'll be filled about two-thirds to three-quarters of the way.
Cover with plastic (not touching the surface of the puddings) and refrigerate until chilled and thickened, at least 6 hours or up to 3 days.
Serve with a dollop of sweetened whipped cream and a few chocolate shavings, if you like. Ripe raspberries are a beautiful adornment and also taste delicious with the chocolate.
sweetened whipped cream, chocolate shavings, fresh raspberries