Line an 8x8 baking pan with foil, then grease with baking spray.
Combine sugar, brown sugar, evaporated milk, pumpkin, butter, salt, and spice in a medium saucepan.
Bring sugar mixture to a rolling boil, stirring constantly. Boil, stirring constantly, for 12-14 minutes or until candy thermometer reaches 236°. When the mixture has reached the ‘soft ball’ stage, take it off the heat.
Let cool for about 10 - 15 minutes and stir in the chocolate chips, marshmallow cream, and three-fourths of the hazelnuts.
It's at this time that you can beat the fudge with a spoon and your hand or an electric mixer.
Immediately pour into the prepared pan. Top with remaining hazelnuts.
Let the pan stand on a wire rack until completely cooled, then refrigerate tightly-covered.
To serve, lift from the pan; remove the foil and cut into 3/4 inch squares.