This is the marsh-mallow plant. Owners of small candy stores would whip the sap from the mallow root into a fluffy candy mold. At the same time, candy makers began to replace the mallow root with gelatin which created a stable form of marshmallow. In 1956, Alex Doumak patented the extrusion process which involved running marshmallow ingredients through tubes. Today, the marshmallow typically consists of four ingredients: sugar, water, air, and a whipping agent (usually a protein).