Line 13 x 9-inch baking pan with foil or, even better, parchment lined foil. Unwrap NESTLÉ® CRUNCH® Fun Size Bars and place in bottom of pan.
Combine sugar, brown sugar, evaporated milk, pumpkin, butter and pumpkin pie spice in a medium, heavy-duty saucepan. Bring to a full rolling boil over medium heat, stirring constantly. Boil, stirring constantly, for 10 to 12 minutes or until candy thermometer reaches 240º F (soft-ball stage).
As soon as you reach your desired temperature, quickly stir in white chocolate chips, marshmallow crème, and vanilla extract. Stir vigoriously for 1 minute or until morsels are melted. Immediately pour into prepared pan, covering the NESTLÉ® CRUNCH® bars. Let stand until completely cooled and refrigerate tightly covered to set the chocolate.
To cut, lift from pan and set on large cutting board, then remove parchment/foil. Place large sharp knife in tall glass of hot water and dip/wipe clean knife in between each slice. Makes about 3 pounds.