Preheat your oven to 325°F.
Whisk together the egg yolks and sugar in a medium bowl. Set aside.
3 egg yolks, 1/4 cup granulated sugar
Heat the heavy cream, salt and vanilla extract in a saucepan over medium heat, gently stirring frequently. If you are using a gas stove, be sure the flame does not come up the sides of the pot or the milk may get scorched.
1 1/2 cups heavy whipping cream, 1/4 teaspoon salt, 1 teaspoon vanilla extract
Once the heavy cream starts to simmer, with just small bubbles around the edges, remove it from the heat.
Temper the egg mixture by adding just a few drops of the hot cream (about a teaspoon to start) while whisking. Continue to gradually add the cream, slowly increasing each addition until all of the cream is incorporated into the eggs.
Strain the custard through a fine sieve to remove any small bits of cooked egg.
Divide the custard between the 4 ramekins or baking dishes.
Place the ramekins in a large baking dish filled with water so that the water comes halfway up the sides of the ramekins.
Bake for 25-30 minutes or until the custard is set.
Cool, then cover with plastic wrap. Refrigerator until chilled, at least 1 hour.
When you are ready to serve, sprinkle a thin layer of sugar over top of the custard. Using a kitchen torch, caramelize the sugar until just golden brown. Allow to cool some. Serve warm.