Hirschhornsalz, also known as Deer Horn Salt, has been a cherished ingredient in traditional German baking for centuries. Its unique properties make it a must-have for creating delightful Christmas treats. Let’s dive into the fascinating world of Hirschhornsalz and explore its role in the holiday baking season. What Is Hirschhornsalz? Hirschhornsalz is a raising agent used primarily during Christmas baking. Unlike modern baking powder, which contains chemical leavening agents, Hirschhornsalz relies on a natural process. .