Ice-cream cake is dairy. If you want cholov yisroel, there's on coney between k and l and ave m and e. 18 st. I don't know if there are more. If not cholov yisroel there's the ice-cream store on ave m and e. 19 and ocean ave, I completely forgot what it's called and if you eat from there anyway. There's also baskin robbins on j if you eat from there.
Thanks, but I am looking for a regular cake- made with butter and with real buttercream or whipped cream frosting. Does not have to be C"Y but I assume any place in Flatbush with a good hechsher will be.