Preheat oven to 300ºF. In a large bowl, whisk together egg yolks and sugar until the sugar has dissolved and the mixture is thick and pale yellow. slowly add cream(temper) and vanilla, whisk until well blended. Strain into a large bowl, skimming off any foam or bubbles.
Divide mixture among 6 ramekins or custard cups. Place ramekins in a water bath (large pan filled with 1 or 2 inches of hot water) and bake until set around the edges, but still slightly loose in the center, about 30- 40 minutes. Remove from oven and leave in the water bath until cooled. Remove cups from water bath and chill for at least 2 hours, or up to 2 days. When ready to serve, sprinkle about 2 teaspoons of sugar over each custard. For best results, use a small, hand-held torch to melt sugar.