I'm not sure about those lollipops!
I made the NYT's recipe today for salt caramels this evening.
The NYT called for boiling the sugar mixture until the tempurature reached 257', which was higher than Epicurious or any other recipe I saw. Most seem to be in the mid to high 240s, though I also saw some complaints on Epicurious that the caramels sometimes had a tendency to be soft. Since the NYTs recipe has slightly different instructions than Epicurious (with Epicurious, you're done cooking after the temp reaches 248', and then you pour into the pan; with NYT, when the temp hits 257 you pull it off the heat, then mix in the butter, salt and vanilla, which Epicurious added much earlier, then pour it in the pan), I thought that might account for some of the temperature difference.
My caramels are still cooling, but I can tell they're going to turn out too chewy and/or brittle, based on early tastes. This is definitely a symptom of boiling at too high of a temperature. (And my candy thermometer goes in 5' increments, so I could have been closer to 260' by the time I got the additional ingredients mixed in.) I'll probably make another batch and experiment with pulling them off the stove when the temp is closer to 250', knowing it might creep up another couple of degrees before the temp starts to fall.
But based on early samples, they still taste good, nonetheless. Fleur de sel toffee, anyone?
One other observation...the NYT recipe called for 2t of salt mixed into the caramels and another 1t sprinkled on top. I can just barely taste the salt with the caramels, but when I put a grain or two on top, it makes all of the difference in the world. So no surprise here: The top coating of salt is the key, and any good caramel recipe could be convered into fleur de sel caramels.