Abstract: A cooking utensil comprises a matrix type keyboard operable for generating cooking program sequences for controlling energization of a heat source. A plurality of key switches are disposed within the matrix keyboard in which an abscissa represents temperature values and an ordinate represents time periods both of which are information for the cooking program sequences. Each of the plurality of key switches is operable for directing the cooking of a kind of a specific foodstuff and for reading out the associated cooking program sequences according to which the heat source is energized to produce the specific foodstuff from starting materials therefor. In a specific form, the cooking utensil can be a combination of a microwave oven and one or more other heat-source apparatus.