01 -
Place a marble or granite slab in the freezer until very cold, at least 1 hour. Lightly butter the surface before cooking the candy.
02 -
Combine sugar, salt, and boiling water in a deep heavy saucepan. Bring to a boil over high heat, cover, and boil for 5 minutes without stirring.
03 -
Remove the lid, reduce heat to medium, and clip on a candy thermometer. Slowly add the heavy cream while the syrup continues bubbling. Do not stir.
04 -
Cook the syrup until it reaches 260°F, hard-ball stage. Remove from heat immediately when it is pale cream colored, not brown.
05 -
Pour the hot syrup onto the cold buttered slab without scraping the pan. Drizzle vanilla over the surface, then use a buttered metal spatula to fold the edges toward the center as it cools.
06 -
When cool enough to handle, pull the candy with cool fingertips for 4-5 minutes until it turns lighter, satiny, and holds soft ridges.
07 -
Stretch into ropes about 1 1/2 inches wide and cut into bite-size pieces with cold kitchen scissors. Space pieces apart, cover with a lint-free towel, and let rest overnight until creamy.