Prepare an 8x8 inch baking dish by lining it meticulously with aluminum foil to ensure ease of fudge removal and subsequent cleaning.

In a suitable microwave-safe bowl, carefully melt the chocolate chips following the specific instructions provided on their packaging. Once melted, the chocolate should appear smooth and devoid of lumps.

Gradually incorporate the sweetened condensed milk into the melted chocolate, ensuring a consistent mixture. Subsequently, add the vanilla extract followed by the Fireball Whiskey or your chosen cinnamon whiskey alternative. Stir the mixture thoroughly until all ingredients are uniformly combined.

Transfer the resultant mixture to the previously prepared baking dish, ensuring an even spread.

Cover the dish with aluminum foil and set aside for a duration ranging from four to eight hours, allowing the fudge to solidify properly.

For more refined slicing, it is recommended to refrigerate the set fudge for an additional hour prior to cutting. Once sliced, serve as desired.

Store any remaining fudge in a sealed, airtight container to maintain its freshness. The fudge is best consumed within a two-week timeframe.