A toaster-cum-microwave oven, comprising: a toasting chamber (36) for accommodating a bread product; a heating device (39) which, when energized, supplies heat to the toasting chamber (36); a humidity measuring device (35) for measuring an inside humidity of the toasting chamber (36) and producing a humidity signal indicating the measured inside humidity; a switching device (23) for selectively cutting or allowing a power supply to the heating device (39); and a controlling device (20a), wherein the controlling device (20a) receives the humidity signal, calculates a rate of change of humidity using the humidity signal, compares the rate of change of humidity with a predetermined value, and controls the switching device (23) to cut the power supply to the heating device (39) after a remaining cooking time has lapsed if the rate of change of humidity is equal to or greater than the predetermined value.
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