cake crumbs

cake and gingerbread

An easy or pleasant task or experience; a piece of cake.

cake walk

Something extremely easy.

eat and leave no crumbs

Synonym of eat (“to be very good at something; to rule; to rock”).

eat one's cake and have it too

Alternative form of have one's cake and eat it too.

Give and take

[Cockney slang]cake

have one's cake and eat it too

To benefit by having two things which are mutually incompatible (such as eating a piece of cake and yet still possessing that piece for future use).

icing on the cake

A thing which intensifies the appreciation of something already good, or (ironic) the regretting of something already bad.

leave no crumbs

Ellipsis of eat and leave no crumbs.