Diamant cookies are icebox cookies characterized by their crisp texture and crumbly, melt-in-your-mouth quality. This recipe uses unsalted butter and powdered sugar as a base, and finishes with a delicate pink color using beet powder. The dough is shaped into a log, chilled in the refrigerator until firm, and then coated with granulated sugar before baking, resulting in a beautiful, jewel-like appearance and a rich, flavorful taste. This baked good is perfect for home cafes, entertaining guests, or as a small gift, and is recommended even for beginners.