Add all of the ingredients into a medium sized pot.
4 medium sized yams, 8 tbsp salted butter, 1 tsp vanilla extract, 3/4 cup brown sugar, 1/2 cup granulated sugar, 1 ounce bourbon whiskey, 1/4 cup light corn syrup, 2 tsp ground cinnamon, 1/2 tsp ground nutmeg, 1/4 tsp ground ginger