These biscuits are made of pure clay only. But the people of Bangladesh still eat. In the 80's, even in the 80's / 90's, a lot of earthen biscuits were available and eaten in Habiganj / Moulvibazar of the country. It was a favorite food of pregnant women in the area, who believed that playing it would protect them from disease and keep the unborn child healthy.
Although it is not known if there is any scientific explanation or evidence for this idea. (However, there are different types of minerals found in the soil , which are beneficial for health! For example: Iron, .....) The name of this earthen biscuit is Chikkar. It is still available, but much less. Some people still eat when they get it. Hindus lived in the hilly areas of Moulvibazar. As a child, they were called "Dukla". Among them, women used to make these shikars and sell them from house to house.
On the other hand, in Habiganj and the surrounding areas, such shikars were made. A kind of fine clay soil is dug out of the depths with the help of long bamboo by digging holes in the hills. Then the pulp and mold are burnt in a special way and made suitable for food. However, the taste of this earthy food is different in Moulvibazar, Habiganj and some other areas. Some people mix rose water, ginger juice, etc. to bring flavor and aroma while making the pulp. Their shape also varies from area to area. Round, rectangular, flat etc. shaped.
Source:- BD History