I don't use spray stuff in my baking pans I am old fashioned, I use shortening or oil and flour. Rub the pan with shortening then sprinkle with flour, shake and turn until the pan is covered, I don't use butter because butter burns easily.
For some reason the Zucchini bread always tastes better the next day. It is good plain and even better with some butter. You can toast it in your toaster too and put butter on it for breakfast. My sister like to treat it like a carrot cake and put cream cheese frosting on it. But I think that takes away the integrity of the bread. I don't care too much for sweets and as I said this is not TOO sweet.