In a saucepan, heat 1/4 cup water and 1/2 cup sugar over medium heat without stirring until it turns a deep amber color. Quickly divide the caramel among the ramekins, swirling to coat the bottom evenly.
In another saucepan, heat 2 cups of heavy cream over medium heat until it begins to simmer. Remove from heat and stir in vanilla extract and salt. Let it sit for a few minutes to infuse.
In a mixing bowl, whisk together 4 large egg yolks and 2 tablespoons of sugar until pale and slightly thickened.
Slowly pour the warm cream into the egg yolk mixture, whisking constantly to prevent curdling.
Pour the mixture through a fine-mesh sieve into a clean bowl to remove any lumps, ensuring a smooth custard.
Evenly divide the custard among the caramel-lined ramekins.
Place the ramekins in a deep baking dish and fill it with hot water until it reaches halfway up the ramekins. Bake at 325°F (160°C) for 40-45 minutes, or until the custard is set but slightly wobbly in the center.
Remove ramekins from the water bath and cool to room temperature. Cover and refrigerate for at least 2 hours (or overnight for the best texture).
Before serving, sprinkle 2 teaspoons of granulated sugar evenly over each custard. Use a kitchen torch to melt the sugar until it forms a golden, crisp crust. If you don’t have a torch, place the ramekins under a broiler for 1-2 minutes, watching carefully to prevent burning.