Preheat oven to 350°F. In a medium saucepan, set over medium heat, add the brown sugar, butter and salt. Bring the mixture to a gentle boil over medium heat, stirring to dissolve the sugar. Continue boiling until it turns a dark brown color, about 2 minutes. Take off the heat and stir in the bourbon and heavy whipping cream. Most likely it’ll bubble up, continue stirring until dissolved. (If the sugar hasn’t dissolved, you can warm it on low heat, stirring constantly, until it dissolves.) Whisk in the pumpkin puree and stir. Remove it from the heat and allow it to cool for about 5 minutes. Then, add the whole egg, egg yolk, cinnamon and cloves. Mix until very smooth.