Place the sugar in a saucepan and allow to heat on medium high heat. Allow the sugar to begin melting. If necessary, use a spoon to mix the remaining sugar crystals with the melted sugar for even melting.
Once sugar is all melted, turn fire to medium or medium-low heat and allow the sugar to slowly brown, approximately 3-7 minutes depending on your pan and stove settings. Watch very carefully.
Once sugar is light brown in color (the color of light brown sugar), immediately add in heavy cream. Slowly stir until the chunks of caramelized sugar have fully dissolved into the cream. Then add splash of Bourbon.
Continue stirring and cooking on medium heat until sauce just coats the back of a spoon or until it reaches its desired thickness. At the end of cooking, add in butter and salt to taste.
Allow to cool and then taste for seasoning. Add additional salt to taste. If it needs thickening, add additional brown sugar.
