Appam powder, also known as rice flour or Appam Podi, is a fine powder made from milled rice, specifically formulated for making Appam, a popular South Indian pancake. It's a key ingredient in Kerala cuisine, used to create both Vellayappam and Noolappam. The powder is typically made from fermented rice and is known for its soft texture and ability to produce a crispy-edged, soft-centered pancake.