Mark D. Thomas argues that the theology of the Eucharist and sacramental prayers in the Book of Mormon are post-Reformation/19th-century in origin.
Mark D. Thomas, "A Rhetorical Approach to the Book of Mormon: Rediscovering Nephite Sacrament Language," in New Approaches to the Book of Mormon: Explorations in Critical Methodology, ed. Brent Lee Metcalfe (Salt Lake City: Signature Books, 1993), 53-80
[Conclusion]
In this essay I have tried to interpret the eucharist in the Book of Mormon from a rhetorical perspective. The eucharistic prayers themselves are in the form of a post-Reformation epiclesis containing a covenant. Some readers may conclude that this points to a nineteenth-century historical setting for the writing of the Book of Mormon. Others may conclude that rhetoric was such a central concern of the ancient authors and/or Joseph Smith that they shaped both form and content of the book to address nineteenth-century issues. Or perhaps there are many areas of common concern between ancient Nephites and early nineteenth-century Americans. Regardless of the origin of the book, understanding its rhetorical features can clarify its messages and help today's readers enter into a dialogue with the book that challenges our understanding of sacramental symbolism.