Yes, Reese's Christmas Trees are gluten-free. The candy is made with peanut butter and chocolate, both of which are naturally gluten-free ingredients. However, it's important to note that some varieties of Reese's products may contain ingredients that are not gluten-free, such as certain flavors of Reese's Pieces. Therefore, it's always a good idea to check the ingredients list on the package to ensure that the product you're purchasing is indeed gluten-free. Additionally, individuals who are highly sensitive to gluten should take extra caution when eating any food item, including Reese's Christmas Trees, as cross-contamination can occur during the manufacturing process.