Good question! At higher temperatures, the dough seems to expand a little more easily. To prevent this from happening, use the lowest setting on your oven when baking your ornaments. Also, place them as far away from the heating element as possible. Usually, this means towards the bottom of the oven. After baking your cut shapes for 30 minutes (at your oven's lowest temperature), flip them gently and make sure to check them every 5 minutes or so. Some ovens cook more quickly than others.