01 -
Oil a 9×5-inch pan lightly. Cut out a piece of parchment to fit, leaving extra hanging over the edges for easy removal. Oil the paper and set it in the pan.
02 -
Slice the butter into chunks and combine it with the cream in a bowl that can go in the microwave. Heat until both are melted and hot, then set aside for later.
03 -
Pour water and corn syrup into a small pot. Add the sugar carefully so it doesn't splash up the sides. Stir gently until the sugar is all wet.
04 -
Place the pot on medium heat and cook until the sugar is boiling. Put a lid on for 1 minute to create steam and melt any sugar crystals on the pot's sides.
05 -
Take off the lid, clip on your candy thermometer, and let the sugar heat up to 320°F (160°C). When the edges turn light amber, add about a sixth of the butter-cream mix while gently stirring with the thermometer's base. Keep adding small amounts and stirring until it's all combined.
06 -
Once all the butter and cream are added, the temperature will drop. Keep cooking on medium, stirring occasionally, until the caramel reaches 240°F (115°C). This takes about 5-10 minutes.
07 -
Carefully pour the hot caramel into the prepared pan. Let it rest for 20 minutes before sprinkling the sea salt over the top. Leave it to cool for about 3 and a half hours, or until completely set.
08 -
Take the caramel out of the pan. If it's sticky or soft, pop it in the fridge for 30-45 minutes to firm up. Use a sharp knife to slice it into pieces—smaller rectangles like 1x1/2 inches work well. Wrap each candy in wax paper or plastic wrap.