01 -
In a medium saucepan, combine heavy cream, egg yolks, granulated sugar, and salt. Heat over medium heat, stirring constantly, until the mixture thickens enough to coat the back of a spoon, about 5 minutes. Avoid boiling.
02 -
Remove the saucepan from heat, stir in vanilla extract, then add the chopped bittersweet chocolate. Let sit for 3 minutes to soften the chocolate.
03 -
Whisk the mixture starting at the center until fully homogeneous. If lumps form due to overheating, strain the mixture through a fine sieve to remove them.
04 -
Divide the custard evenly into ramekins and refrigerate for a minimum of 3 hours to set.
05 -
Allow ramekins to sit at room temperature for 15 to 30 minutes before serving. Garnish with whipped cream and chocolate shavings if desired.