Pumpkin-Maple Cream Trifle

Maple Walnuts (optional, see Cook's Tip)

box (14.4 oz/400 g) whole graham crackers (5 x 2 in./13 x 5 cm)

plus 3 tbsp (45 mL) pure maple syrup (do not use maple-flavored pancake syrup), divided

pkg (3.4 oz/102 g) cheesecake or vanilla instant pudding and pie filling

milk

solid pack pumpkin (not pumpkin pie filling) (1 3/4 cups/425 mL)

cinnamon

container (12 oz/1 L) frozen whipped topping, thawed, divided

Additional cinnamon