Stir cream and vanilla paste together in a medium saucepan. (If using a whole vanilla bean, scrape the beans into the saucepan and also put the vanilla pod in). Bring to a boil. Watch closely because it can easily boil over. Cover and remove from heat. Let sit for 15 minutes.
Preheat oven to 325 degrees. Arrange 6 ramekins in a single layer in a 9x13 baking dish. Set up the water bath: fill the baking dish with hot water until it reaches about halfway up the sides of the ramekins. The water does not have to be boiling.
In a bowl, whisk egg yolks and 1/2 cup sugar together. Remove vanilla bean pod, if using, from the cream mixture and discard. Slowly pour the cream into the egg mixture, a little at a time, whisking constantly.
Divide the custard mixture evenly among the ramekins. Bake 40-45 minutes, until custard is set but still jiggly. When cool enough to handle, remove from the baking pan to cool on a wire rack.
Cover and refrigerate several hours until set. Remove from the refrigerator and sprinkle evenly with the remaining 1/2 cup sugar. Use a kitchen torch to burn the sugar topping until browned.