Prepare cake mix according to box instructions in 13x9 pan. Let cool. Cut into 1" pieces.
Prepare pudding according to instructions and let sit for 5 minutes to set up.
Layer trifle: 1/3 of Caramel, pinch of salt on caramel, 1/3 of cake, 1/3 of pudding, 1/3 of Cool Whip, 1/3 of Cinnamon Chips. Repeat two times. Finish top layer with a drizzle of caramel and nuts.