Some women have baked a big cake which appears like a stack of Islamic kitaabs.

Answer

The cake is a shaitaani-inspired stunt. Rasulullah (Sallallahu alayhi wasallam) said:

"If you know what I know (of Maut, the Qabar and Aakhirat), you will laugh little, cry much and not derive any pleasure from your wives…"

While Maut hovers over our heads and calls on us reminding us about its coming, according to our Nabi (Sallallahu alayhi wasallam), people totally oblivious of this reality and of the suffering of Muslims, especially in Palestine, indulge in stupid, time-wasting, money-wasting cake stunts in emulation of western kuffaar ways and mindsets- and they do so to display merrymaking which in turn is the evidence for their total lack of feeling for the suffering Ummah in Palestine and elsewhere. Will anyone indulge in such silly merry-making stunt if there is a death in his/her house?

This is another shaitaani stunt to divert the minds of Muslims from the reality of the objective for which Allah Ta'ala has sent us to this earthly abode for a very short sojourn. Are these people going to show-off their shaitaani cake stunt on the Day of Qiyaamah? Will they be pleased when this shaitaani cake will be displayed for disgracing them on the Day of Qiyaamah? Futility is haraam.

Did they find nothing else to mock other than Instruments of Allah's Deen? It is HARAAM to eat of this satanically inspired cake.