1. SAFFRON : Saffron is one of the most delicate spices in the whole world. It is derived by drying the stigma of the flower Saffron Crocos . This spice is used both as a coloring as well as a seasoning agent. This spice is also one of the most expensive ones and is valued greatly for its coloring abilities more than anything else. Usage - Saffron is mostly used as a coloring agent in sweets as well as Kheers. It lends the Kheer a quaint yellow color and also imbibes it with the flavor as well. A few strands of Saffron are first taken and then grounded up in a bow with a small amount of milk. When the milk turns light orange, then it is ready to be added to the Kheer. A special point of interest in Indian cooking, Saffron is always added at the end of the preparation of a dish. This is in contrast to the European dishes like the Paella, where the Saffron is added either at the beginning or half way through.
2. BLACK CARDAMOM : Black Cardamom also known as "Bada Elachi" (Big Cardamom in Hindi) is well defined by the smoky aroma. It is widely used as a flavoring agent like its green cousin. The black Cardamom is widely used in cooking all the way from India to China and has found its place in a variety of dishes ranging from the erstwhile Biryani to the noodle soup. Usage - Black Cardamom is defined by its smoky aroma and is not used in Sweets like the green cardamom. Instead, it is used primarily in the preparation of Dals, Curries and Biryanis. It has a strong pungent aroma which is better suited for the preparation of curries than a kheer. It is stored in the same way as the green cardamom and the pods are released just before adding it to the dish. The black cardamom is also used in the preparation of the famous Garam Masala, a popular blend of Indian spices, used in several North-Indian dishes.
3. GREEN CARDAMOM : Green Cardamom is a small seed pod with black seeds in the shell. This is used primarily for flavoring anything from drinking water to a cup of Chai (Indian Tea). It is small in size compared to the other cardamom variety but packs quite a nice aroma inside its pod. The green cardamom is also used in medicine to treat infections of the teeth and the gums. Usage - Green cardamom is used mainly as a flavoring agent and it is best stored in its pod itself. Typically the pod should be opened just before the green cardamom is to be added to the dish be it a Kheer or a glass of Chai. To get the best optimum effect, it is better to just crack the pod and add the whole thing into the dish.