Dattelsirup, or Date Syrup, serves as a natural sweetener in the Walnut Cookies recipe. It adds a rich, caramel-like sweetness that complements the nuttiness of walnuts, enhancing the overall flavor profile. Date syrup also contributes to the soft texture of the filling, creating a mouthwatering experience when combined with the crispness of the cookie.

Yes, you can substitute powdered sugar with alternative sweeteners like erythritol, stevia, or any other powdered sugar substitute of your choice. Ensure to adjust the quantity based on the sweetness level you desire. Keep in mind that the choice of sweetener may slightly alter the texture and taste of the cookies.

To maintain freshness, store the Walnut Cookies in an airtight container at room temperature. Placing a piece of bread in the container can help retain moisture and keep the cookies soft. If you want to extend the shelf life, consider refrigerating the cookies, but allow them to come to room temperature before serving for the best taste and texture.

Yes, you can prepare the dough in advance and freeze it for later use. After kneading the dough, divide it into portions, wrap each portion tightly in plastic wrap, and store them in an airtight container or a resealable bag. When you're ready to bake, thaw the dough in the refrigerator overnight, bring it to room temperature, and follow the remaining steps in the recipe.

For dietary preferences or allergies, you can make various modifications. For a gluten-free option, substitute the all-purpose flour with a gluten-free flour blend. If allergic to eggs, consider using an egg substitute like applesauce or a flaxseed-water mixture. Additionally, for a vegan version, use plant-based butter and an egg substitute. Adjusting the recipe based on dietary needs allows everyone to enjoy these delightful Walnut Cookies.