Prepare the Pan: Line an 8x8 inch square baking dish with parchment paper, ensuring the edges overhang for easy lifting later.
Melt the Ingredients: In a medium saucepan, over low heat, combine the semi-sweet chocolate chips, sweetened condensed milk, and unsalted butter. Stir continuously until the mixture is fully melted and smooth.
Add Flavorings: Remove the saucepan from the heat and stir in the vanilla extract, ground ginger, ground cinnamon, nutmeg, allspice, instant coffee granules, and a pinch of salt. Mix thoroughly.
Incorporate the Cookies: Gently fold the crushed gingerbread cookies into the chocolate mixture until evenly distributed.
Pour into the Pan: Transfer the fudge mixture into the prepared baking dish, spreading it out evenly.
Chill to Set: Place the baking dish in the refrigerator and allow the fudge to chill for at least 2 hours, or until set.
Cut and Serve: Once set, lift the fudge out using the parchment paper overhang and cut into small squares.
Notes
Serve on a decorative platter and dust lightly with powdered sugar for an elegant finish.