I have a biscuit/cookie recipe that involves egg and butter - after I bake the cookies how long will they keep, at room temperature in an air-tight container?
(edit: In the USA cookies are (sometimes?) made with egg, is that right? In which case I'm just asking how long cookies keep)
edit: If context helps: my daughter has epilepsy and is on a medically supervised ketogenic diet. What she eats has to be carefully made and carefully rationed. I'm making her a batch of biscuits based on this recipe and so I'm wondering how big a batch I can make in one go based on how long they will keep. I imagine all the ingredients are pretty long lasting except for the eggs and butter.