01 -
Lightly oil a 9×5-inch loaf pan. Cut a piece of parchment paper to fit inside with at least an inch overhang on the sides. Lightly oil the parchment paper, place it in the pan, and set aside.
02 -
Cut the butter into 8 pieces, then add to a microwave-safe bowl. Add the heavy cream. Heat in the microwave for 1 to 2 minutes until the butter melts and the mixture is hot. Set aside.
03 -
In a small saucepan, combine the water and corn syrup. Add the sugar, being careful not to splatter it on the sides of the pan. Gently stir the sugar into the water and corn syrup, just enough to moisten it.
04 -
Heat the mixture over medium heat until the sugar boils. Cover with a lid for 1 minute to create steam. Remove the lid and attach a candy thermometer. Cook until it reaches 320°F (160°C) and turns light amber, 5 to 10 minutes.
05 -
Carefully and slowly pour about a sixth of the butter and cream mixture into the sugar, stirring to incorporate. Repeat with remaining cream and butter in small batches, stirring between additions.
06 -
Continue cooking until the caramel reaches 240°F (115°C), 5 to 10 minutes.
07 -
Pour caramel into prepared pan. Let cool for 20 minutes, then sprinkle with salt. Allow to cool completely (about 3 ½ hours).
08 -
Unmold the caramel. If too soft, refrigerate for 30-45 minutes. Cut into 1-inch by 1/2-inch rectangles. Wrap individually in plastic wrap or waxed paper.