Chocolate zuchini cake. Sounds horrible, doesn't it?

However, you cannot taste the zuchini but it makes the moistest cake. It looks like a long recipe but the recipe is from a friend who added a lot of helpful notes. Oops--forgot to add my own shortcut--if I'm in a hurry, I just use the canned dark chocolate frosting and it's yummy, too.
Chocolate Zucchini Cake
CAKE
1 box Cake mix - dark chocolate fudge type
1 tsp Ground cinnamon
3 Eggs
1¼ cup Water
½ cup Vegetable Oil
1 cup Shredded zucchini, firmly packed (peeled or unpeeled)
-Preheat oven to 350°
-Grease pan(s) – (1) 10”x 13” cake pan or (2) 5”x 9” loaves or bundt pan
Combine cake mix and cinnamon in mixing bowl
-Add egg, water and oil
-Beat with mixer 2 minutes, medium speed
-Stir in zucchini, combine well
-Pour into pan(s)
-Bake at 350° until done – use clean toothpick test (cake: 25-35 min., loaves 30-45 min., bundt 35-50 min)
FROSTING
½ brick Softened cream cheese (I use low-fat Neufschatel)
½ stick Softened butter (unsalted)
2 cups Powdered sugar (use more if frosting gets too runny)
1½ tsp Vanilla extract
1 tsp Milk (use only if frosting gets too stiff)
¼ cup Chopped, toasted nuts (optional)
-Combine butter and cream cheese in mixer
-Beat at medium speed until well blended and smooth
-Add powdered sugar and vanilla extract
-Beat until smooth and creamy
-Add milk or powdered sugar as needed; beat until frosting is right consistency
-Spread on cooled cake(s)
-Sprinkle with chopped nuts, if desired
-KEEP CAKE REFRIGERATED (as well as any leftover frosting)
NOTES:
-I always double the recipes (to make 4 loaves) and freeze half after frosting.
-Any brand of dark, fudge cake mix works great.
-You can be very generous with the zucchini – pack the heck out of that cup! To some extent, the more zucchini you use, the moister the cakes will be.
-Peel very large zucchini (with tough skin). Small zucchini are fine unpeeled.
-To freeze: frost and refrigerate. After the frosting sets up, wrap tightly in Saran Wrap and seal wrapped cake in a Ziploc baggie.
-To toast nuts – spread nuts on cookie sheet and toast in 300° oven for 8-15 minutes, tossing occasionally. Cool, then chop. Pay attention to the smell; don’t let them burn!