6 whole apples, such as Honey Crisp or any other sweet apple of your choice
6 whole cinnamon sticks
1 (750-ml) bottle bourbon
Core and slice the apples. Add these slices and the cinnamon sticks to a clean half-gallon mason jar with a tight-fitting lid (or several smaller mason jars — just split the ingredients evenly between jars).
Pour the bottle of bourbon into the mason jar, making sure that the apples and cinnamon are covered. Seal the jar tightly with their lids, and store the bottles somewhere cool and dark to infuse.
Let the bourbon infuse for up to two weeks, shaking the jar occasionally to mix the ingredients. Taste the bourbon occasionally — it's ready when it tastes good to you. The longer you let it sit, the more flavor and sweetness it will have.
When ready, strain the apples and cinnamon sticks from the bourbon and discard them. (You might be temped to re-purpose the apples, but they will be flavorless since all of their flavor has infused into the bourbon.)
Transfer your infused bourbon into a new bottle (or several smaller gift-sized bottles). If you're making this for holiday gifts, add a cute label and decorate to your heart's content.
This bourbon can be enjoyed on its own or mixed into your favorite cocktails for a signature holiday flavor.