a method of making cookware containing a bonded composite comprising the steps of providing at least two layers of materials by pressurizing and heating wherein the first of the at least two layers of materials has a plurality of spaced - apart bubbles formed on its surface , defining a cooking surface of the cookware , and a second layer of two layers of material is bonded thereto , wherein the bonding between the bubbles and the second material is of a lesser degree than the bonding between the first and second layers of materials in areas intermediate the bubbles , whereby a coefficient of heat conductivity is greater in the intermediate areas than in the bubbles . the method also includes providing a plurality of sets of bonding blank assemblies by solid state processing under pressure and heat .