Do you have high-altitude instructions? August 21, 2018 19:28 Updated Nope, our mixes will cook the same no matter the altitude. Related articles Can I use a different oil than what is recommended on the box? What can I use as a vinegar replacement? How can I prevent the muffins from sticking to the muffin liners? What can I use as an egg replacement? Are your products vegan? Comments 0 comments Please sign in to leave a comment.