An earthen oven is a simple oven made of earth. It can be used to bake bread, pizza, etc.
To create an earthen oven, a base foundation will be needed, created of rammed earth, mudbrick, cement, etc.
Then a dome of sand, covered with newspaper is formed.
A mud mixture of sawdust, straw, or any binder is mixed. The first layer of mud applied to the sand dome should be more clay than sand called the thermal layer.
A second layer of mud, the insulation layer should be added, but the mud mixture should be more sand than clay.