A method of producing a clad sheet formed by joining a clad layer at least containing nickel, chromium, silicon, and phosphorus to a base material made of a stainless steel or a nickel-based alloy. A step of forming the clad layer includes contact-bonding a mixed powder to the base material, wherein an alloy powder that contains at least one selected from chromium, silicon, and phosphorus as components, and a nickel powder that functions as a binder to have the alloy powder be contact bonded to the base material are mixed in the mixed powder.