Crescent biscuits are a traditional pesach biscuit for some Ashkenazi Jews (not that I am one, lol) made with potato starch (can’t use corn starch, it’s Kitniyos) and matza meal (basically powdered matza) and other biscuit ingredients such as sugar and eggs. Those who don’t eat matza with water (‘gebrok’) can’t have them though.

And yes, there are also pesach cakes, known as plavas. And yes, they involve a lot of separating eggs.