Prepare the pan: Line an 8x8-inch square pan with parchment paper, leaving some overhang to easily lift out the fudge once it sets.
Melt the chocolate: In a microwave-safe bowl, melt the white chocolate chips in 30-second intervals, stirring between each round until smooth.
Combine pumpkin and spices: Stir the canned pumpkin, cinnamon, nutmeg, and vanilla extract into the melted chocolate until fully combined.
Pour into the pan: Pour the mixture into the lined pan and smooth the top.Chill: Refrigerate the fudge for 2 hours or until firm.
Cut and serve: Once set, lift the fudge out of the pan using the parchment overhang. Cut into 16 squares and enjoy!