Prepare the baking dish: Line an 8×8 inch square baking pan with parchment paper. Leave some overhang to make it easier to lift out the fudge later.
Melt the chocolate: In a saucepan over low heat, melt the chocolate chips along with the sweetened condensed milk. Stir continuously to ensure the mixture doesn’t burn.
Add pumpkin and spices: Once the chocolate is fully melted, remove the pan from heat and stir in the pumpkin puree, vanilla extract, cinnamon, and nutmeg until fully combined.
Transfer to pan: Pour the mixture into the prepared baking dish, spreading it evenly.
Chill: Refrigerate for at least 2 hours to allow the fudge to set properly.
Slice and serve: Once set, lift the fudge out of the pan using the parchment paper overhang. Cut it into small squares and enjoy!