In a large skillet, melt the butter over medium-high heat. Add the pork tenderloin and garlic, and cook for 5 minutes, stirring often, until the pork is lightly browned.
In a medium bowl, whisk together the bourbon, beef broth, brown sugar, Worcestershire sauce, cinnamon, nutmeg, and cayenne pepper. Pour the mixture into the skillet and bring to a boil. Reduce heat to low and simmer for 5 minutes.
Transfer the skillet to the preheated oven and bake for 25 minutes, or until the pork is cooked through and the sauce is reduced and thickened.
Remove from oven and let stand for 5 minutes before serving.
Interesting Facts
Pork tenderloin is a lean and tender cut of pork that is full of flavor.
Bourbon is a type of whiskey made from corn, rye, and other grains.
The flavors of cinnamon, nutmeg, and cayenne pepper complement the sweetness of the bourbon.