Preheat the oven to 325°F (160°C).
In a saucepan, heat the heavy cream and vanilla over medium heat until just simmering. Remove from heat and let cool slightly.
In a bowl, whisk together the egg yolks, half of the sugar, and salt until the mixture lightens in color.
Gradually whisk the warm cream into the egg yolk mixture.
Strain the mixture through a fine sieve into a measuring cup with a pour spout.
Place ramekins in a baking dish and fill the dish with hot water halfway up the sides of the ramekins.
Pour custard mixture evenly into the ramekins.
Bake in the preheated oven for 40-45 minutes or until set but still slightly jiggly in the center.
Remove from the oven, let cool to room temperature, then refrigerate for at least 2 hours.
Before serving, sprinkle the remaining sugar evenly on top of each custard.
Use a kitchen torch to caramelize the sugar until golden brown and crisp.