Marshmallow was invented in 2000 BC by the Egyptians

The word "marshmallow" comes from the mallow plant species (Althaea officinalis), an herb native to parts of Europe, North Africa, and Asia which grows in marshes and other damp areas. The plant's stem and leaves are fleshy and its white flower has five petals. It is not known exactly when marshmallows were invented, but their history goes back as early as 2000 B.C. Ancient Egyptians were said to be the first to make them and eating them was a privilege strictly reserved for gods and for royalty, who used the root of the plant and to soothe coughs and sore throats, and to heal wounds. The first marshmallows were prepared by boiling pieces of root pulp with honey until thick. Once thickened, the mixture was strained, cooled, and then used as intended.

It become more of the candy we know today in the early 1900s.

Marshmallow was weaponized in the mid 1970s when a young Charlie Weis smuggled three bags of marshmallows into Notre Dame stadium for a second half snack and his roommate grabbed a bag and began throwing them at fellow students, much to Weis’ dismay.