In a small bowl, sprinkle the unflavored gelatin over 1/2 cup of cold water. Let it sit for 5 minutes to bloom.
In a saucepan, combine the remaining 1/4 cup cold water and the flavored gelatin mix. Heat over medium-low heat, stirring constantly until the gelatin mix is completely dissolved. Do not boil.
Remove the saucepan from the heat. Stir in the bloomed gelatin mixture until it is fully dissolved into the hot liquid.
Whisk in the Fireball whisky, peppermint schnapps, and peppermint extract. Stir until everything is combined.
Carefully pour the mixture into silicone candy molds or a shallow, lightly oiled baking dish.
Place the molds or dish in the refrigerator and chill for at least 4 hours, or until completely firm.
If using molds, gently pop the gummies out. If using a dish, cut the set gelatin into small squares.
If desired, roll the finished gummies in crushed candy cane pieces before serving.
Notes
For a stronger alcohol flavor, reduce the amount of cold water slightly in the initial steps.
If you want a firmer gummy, add one extra packet of unflavored gelatin.
Store these boozy Christmas treats in an airtight container in the refrigerator for up to one week.