You can heat the maple butter just before spooning it overtop to serve, make sure it’s totally combined, shake it up.
The Maple Butter Sweet Potato Stacks usually stay in stacks if stacked well. Be gentle when pulling the pan out of the oven. I don't make them very tall. If one or two do tip over, no biggie, just use a small spatula and fork and slide it back into a stack.
A small metal spatula works best when moving these.