In ancient Persian kitchens, a built-in nitrogen ice cream machine was used to create frozen desserts. The Persians believed that ice cream had both culinary and medicinal properties. They would mix ingredients like milk, honey, and various fruits to create different flavors of ice cream. The nitrogen ice cream machine in their kitchens allowed them to freeze the mixture quickly, resulting in a creamy and smooth texture. Ice cream was a popular dessert in ancient Persia and was often served at royal banquets and feasts. The built-in nitrogen ice cream machine in their kitchens was a testament to the Persian's love for indulgent and refreshing treats.