Food, glorious food..

I baked myself a cake and gave a big shout
Because I had left all the calories out.

I'll eat the whole thing and still remain thin
Can you imagine how that makes me grin?

I hid it from view, this one I will hoard
But this lovely cake had the taste of cardboard,

So into the bin, it went with a clunk
Now get the real cake and cut me a chunk!