A strong liquid food flavoring used to flavor saucers or other foods. The Colgin manufacturing company, explains how liquid smoke is made "Colgin Liquid Smoke is not a chemical or synthetic flavor - but genuine wood smoke "liquefied." The wood is placed in large retorts where intense heat is applied, causing the wood to smoulder (not burn). The smoke passes into condensers where sudden chilling liquefies the smoke. The Liquid Smoke is filtered and passes into large oak aging tanks for mellowness ".
Buy liquid smoke at most grocery stores or its available online at Colgin.com