Butter and line an 8-inch baking pan with parchment. Set it aside.

Simmer the apple cider in a medium saucepan over medium heat until it is reduced to a dark, thick syrup, roughly 2/3 cup (5floz/150ml) in volume. This takes about 35 to 40 minutes on the stove. As it reduces, skim away any scrum/foam that floats to the top to ensure perfect looking caramels.

Once you are finished reducing the apple cider, remove it from the heat and pour it into a clean medium saucepan and add in the butter, sugars, heavy cream, cinnamon, and salt. Return the saucepan to medium-low heat with a candy thermometer attached to the side, and let it simmer JUST until the thermometer reads 250°F (125°C) and no longer. Keep a close eye on it because if it goes over this temperature your caramels will be hard to eat.

Immediately remove caramel from heat and pour it into the prepared pan. Let it sit until cool and firm—about 3 hours or overnight. Once the caramel is firm cut into bite-size pieces and wrap them in wax paper or candy wrappers. Store at room temperature for up to 3 weeks.