Saffron (Kesar) is the most expensive spice and it is a colour too. Saffron has a very subtle flavour and aroma. It is used as a culinary seasoning for chicken and meat, biriyani, pulao, etc. It adds taste, colour, and aroma to Indian sweets like Rasmalai, Kesar Pista etc. and flavours kheer, badam milk, saffron milk, etc.