Line an 8" square pan with parchment paper.
Combine the butter, sugar, corn syrup, and maple syrup in a medium saucepan over medium heat. Clip your candy thermometer to the side of the pan, ensuring that the bulb isn't touching the saucepan. Stir until the mixture begins to boil.
½ c unsalted butter, 2 c granulated sugar, 1 c light corn syrup, ¼ c maple syrup
Slowly add evaporated milk, whisking constantly. The mixture must maintain a constant boil to avoid curdling.
1 12 oz can evaporated milk
Continue stirring until mixture reaches the firm ball stage (245℉-249℉).
Remove from heat and stir in the whiskey and heavy cream.
3 tablespoon whiskey, ½ c heavy cream
Pour the caramel into the prepared dish and top with sea salt, if desired. Cool in the refrigerator for at least 4 hours. When ready, remove caramels from the refrigerator to set at room temperature. Cut into squares and wrap in wax paper.
sea salt