In a medium bowl, mix the flour, sugar, salt, soda, and cocoa.
In a separate mixing bowl, combine the oil, vanilla, egg, and zucchini. Add in dry ingredients and mix until combined.
Pour mixture into a 9x13 greased pan and bake at 350 degrees for 20 minutes.
Frost after it's cooled.
To make the Fudge Frosting, mix the sugar, cocoa, and salt in a medium bowl. Add in the water, vanilla, and butter, and beat until smooth. Frost the cake immediately.
Recipe by Saving Cent by Cent at https://savingcentbycent.com/2014/08/15/zucchini-cake-fudge-frosting/