Spice rub the salt for flavor and the sugar for caramelization. The simplest rub is just coarsely ground black pepper as in steak au poivre. Spice rubs can also have ingredients such as herbs, crushed garlic or oil added to make a paste. Less common ingredients can include coffee beans. Spice rubs are mainly used for preparing meats and fish. There are many different recipes for rubs and most of them are targeted towards a specific kind of food. The exact combination of spices that makes a good rub for a particular kind of food varies from region to region and culture
Mirzapur, Ishwarganj, Mymensingh general purpose spice mixture composed of fenugreek seeds, nigella seeds, celery seeds, cilantro seeds, and black mustard seeds. This mixture is more convenient for vegetarian dishes and fish preparations. The use of spices for both meat and vegetable dishes is quite extensive and includes many combinations. The combination of whole spices, fried and added at the start or finish of cooking as a flavoring is special to each dish. Whole black mustard seeds and freshly ground mustard paste form a typical combination. A pungent mustard sauce called "kashundi" is sauce for snacks or sometimes makes a base ingredient for fish