5 Best Wet Grinders Apr 2021 BestReviews. A wet grinder is a machine used to grind grains, lentils, spices, nuts, or coconut into paste Wet grinders are used frequently in the preparation of Indian cuisine, where they are used for making batter for idlis and dosas, for grinding chutney or masala, and for preparing other foods Some grinders can hold a larger quantity of ingredients and some ...