Green’s Dictionary of Slang

frost a cake v.

also cut a cake

(US) to make a difference.

[US]E. Townsend Chimmie Fadden and Mr Paul 146: It don’t frost no cake wedder it is Mark or me dat gets it.
J. Peacock Drill and Die 192: That’s what I thought you said [...] But that don’t cut no cake on this other [HDAS].