Line a 13x9x2-inch pan with aluminum foil; set aside.
In a Dutch oven, combine sugar, butter, milk, pumpkin, corn syrup, pumpkin pie spice, and cinnamon over medium-high heat. Bring mixture to a boil, stirring constantly, until a candy thermometer registers 234°.
Remove from heat; stir in white chocolate until melted. Stir in remaining ingredients until smooth. Quickly pour into prepared pan. Let cool for 2 hours. Cut into small squares to serve.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/pumpkin-fudge/