Bread is the staff of life, but the pudding makes a good crutch.
The source for the proverb is David Crystal’s book, As They Say in Zanzibar: Proverbial Wisdom from Around the World (Oxford University Press: 2006). Here is an anecdotal account of the saying's origin: "An elderly farmer's wife, reading aloud the Scriptures to her little household, as was her wont, came to this passage, "bread is the staff of life," on which the housemaid remarked, that pudding was a good crutch (Google Books).
The image is by sk8geek at Flickr.
The poster is made with AutoMotivator.