In a medium bowl, combine the peanut butter, confectioners' sugar, whisky, vanilla extract, and cinnamon. Mix until ingredients are combined and a dough forms.
Stir in the peanuts and graham crackers.
Form the dough into 1-inch balls and place them on a parchment-lined baking sheet.
Refrigerate the balls for at least 10 minutes before serving.
Interesting Facts
This recipe makes about 16 whiskey balls.
These whiskey balls can be stored in an airtight container in the refrigerator for up to a week.
Feel free to experiment with different flavors of whiskey or add other ingredients such as chopped nuts or dried fruit.