In a mixing bowl, whisk the egg yolks with the sugar until smooth and slightly lighter in color.
Warm the heavy whipping cream in a saucepan over medium-low heat until steaming and hot (do not boil).
Slowly pour the hot cream into the yolk mixture while whisking constantly. Whisk in the vanilla extract. Strain through a fine-mesh sieve.
Divide the custard into ramekins. Place ramekins in a baking dish and carefully pour hot water into the dish until it reaches halfway up the ramekins.
Bake at 325°F (163°C) until the edges are set and the center still jiggles slightly.
Remove ramekins from the water bath. Cool to room temperature, then cover and refrigerate until fully chilled and set.
Sprinkle an even, thin layer of sugar on top and torch until melted and deep golden. Let sit 1–2 minutes to harden.
Garnish if desired and serve immediately.