While you can use white vinegar in place of apple cider vinegar, it usually isn't recommended. (puppywire.com)
I also used plain water in place of the apple juice to cut down on added sugars. (ibreatheimhungry.com)
The use of coconut flour in place of the apple flour worked fantastic, and actually kept better form than the apple flour itself, while replacing lard with palm shortening was also a winner. (beyondthebite4life.com)