egg. everyone that tried it said they enjoyed it and commented on its unique flavor. i think the meringue made it look prettier than anything else. i like meringue, but i am not sure it really added anything to the overall flavor of the pie. all in all, if you are looking for a new and interesting way to make a cherry pie, this is definitely one to try. after all, it fits the bill for being considered "good pie" as my grandpa claims! 