For a spicier kick, add a pinch of cayenne pepper or a dash of your favorite hot sauce. If you prefer a smoother sauce, you can blend it with an immersion blender after simmering. The sauce tastes even better the next day, as the flavors have more time to meld together. Experiment with different types of whiskey for a unique twist on the classic recipe. Bourbon, rye, or even scotch can add interesting flavor profiles.