be a piece of cake

be a piece of cake

To be a very easy task or accomplishment. I thought I was going to fail the test, but it turned out to be a piece of cake!
See also: cake, of, piece
References in periodicals archive ?
But he warned: "It won't be a piece of cake. The Portuguese had to prove themselves by qualifying at the expense of some other decent sides."
He's fooling himself if he thinks the military thing would be a piece of cake. It wouldn't.
Compared to that, getting them all down from the cross would be a piece of cake: "If thou art the Christ, save thyself, and us, then." Don't just stand there.