Mind you, GLaDOS, the domineering robot mother promising you the cake, does actually reveal near the end that she knows some cake recipesand then there's a scene in the closing titles which suggests there really was cake, but it's left a bit deliberately ambiguous, to toy with your emotions.
(,
Wed 20 Apr 2011, 22:56,
archived)
~~ SPOILER ALERT ~~:D
(
drimble he'd been white, he'd been black,
Wed 20 Apr 2011, 22:58,
archived)