Mix graham cracker crumbs with sugar and softened butter. Press into 9x13 pan. Bake at 350 degrees for 8-10 minutes & let cool.
Mix marshmallow cream, pumpkin, spices, & salt together. Fold in 2/3 of whipped topping & spread over the graham cracker crust. Spread the remaining whipped topping over the pumpkin mixture. Top with toasted coconut or nuts (optional) & chill until set.