Place baking rack in center of oven and preheat to 350ºF.
Line cupcake pans with liners and spray top of pan with cooking spray.
Place cake mix, pudding mix, milk, oil, eggs and cinnamon in a large mixing bowl.
Blend with mixer on low for 30 seconds. Scrape down sides of bowl and increase to medium for 1-1/2 to 2 minutes.
Spoon 1/3 cup of batter into each liner (about 3/4 full). Place pan(s) in oven on middle rack.
Bake cupcakes till they are golden brown, (about 18 to 22 minutes). Cool on wire racks for 5 minutes. Slowly and carefully turn pan on it's side and remove cupcakes. Cool 15 minutes and frost with Cinnamon Cream Cheese Frosting (Cinnamon Cream Cheese Frosting) (or buy some cream cheese frosting, add cinnamon to taste, ice cupcakes and sprinkle tops with cinnamon sugar).