When making pastes like Shorshe bata and posto bata, we prefer to use the traditional tool known as Shil Nora or Shil Batta. While it is not necessary, it is the preferred method. If you do not have access to this tool, you can use a grinder instead. The Shil Nora is the most ideal tool for creating pastes as it provides a more authentic flavor and texture. To see how to use this tool at home, you can refer to the video I have shared.