Adobe bricks (mud bricks) are made of earth with a fairly high clay content and straw. If produced manually the earth mix is cast in open moulds onto the ground and then left to dry out. Adobe bricks are only sun-dried, not kiln-fired. When used for construction they are laid up into a wall using an earth mortar.The definition of adobe is a type of clay or soil used to make bricks. The homes of the Pueblo Indians in the Southwest U.S. are examples of houses built with adobe bricks.An adobe brick is a composite material made of earth mixed with water and an organic material such as straw or dung. The soil composition typically contains sand, silt and clay. Typically the soils of the Southwest United States, where such construction is in use, are an adequate composition.What they did have was dirt, rock, and straw and, with these materials, they made their adobe houses in communities called pueblos. Adobe is mud and straw mixed together and dried to make a strong brick-like material. Pueblo peoples stacked these bricks to make the walls of the house.Mix dry sand & sifted clay together first, then add water and start stomping. Use the tarp to roll drier mix on top of the wetter mix, keep stomping, and continue adding water until the cob is sticky but stiff. It should look uniform and should roll into a “cob burrito” when the tarp is pulled.Make Adobe Bricks. Fill the hole halfway with the clay soil and enough water to make a stiff mud. If you like, you can mix in a small amount of straw. Shovel the mixture into the brick form.