Carved from volcanic rock (basalt), millstones are used for grinding nixtamal into masa. Volcanic rock is traditionally used due to its naturally porous texture, which helps aerate the masa.
Kernel of Truth Organics is the first and only full tortillería in L.A./Boyle Heights making tortillas from certified organic American corn using the traditional nixtamal method onsite.
Founded in 2014, Masienda works with smallholder Mexican farmers to operate a vertically-coordinated value chain for heirloom corn, masa and companion products.
Kernel of Truth Organics: https://www.kotorganics.com/