Cooking appliance having a cooking compartment for cooking food to be cooked, an oxygen sensor , arranged in the cooking compartment , for determining a current signal curve (AO) of an oxygen concentration in the cooking compartment , a nitrogen sensor , arranged in the cooking compartment , for determining a current signal curve (AN) of a nitrogen concentration in the cooking compartment , a humidity sensor , arranged in the cooking compartment , for determining a current signal curve (AF) of a humidity concentration in the cooking compartment , a temperature sensor , arranged in the cooking compartment , for receiving a heating curve (AT) of the cooking compartment , a storage unit , in which a plurality of oxygen reference signal curves (R1) for the oxygen concentration in the cooking compartment , a plurality of nitrogen reference signal curves (R2) for the nitrogen concentration in the cooking compartment and a plurality of humidity reference signal curves (R3) for the humidity concentration in the cooking compartment are stored, and a control facility which is designed to determine a residual cooking time (RG) of the food to be cooked by means of a comparison of the determined current signal curves (AO, AN, AF) with the plurality of stored reference signal curves (R1- R3) and as a function of the recorded heating curve (AT), and wherein the control facility is designed to record the signal curves (AO, AN, AF), determined by the sensors during a cooking process carried out by a user, of the oxygen concentration, nitrogen concentration and humidity concentration in the cooking compartment and to store the recorded signal curves as reference signal curves (R1-R3) in the storage unit . a cooking compartment for cooking food to be cooked, an oxygen sensor , arranged in the cooking compartment , for determining a current signal curve (AO) of an oxygen concentration in the cooking compartment , a nitrogen sensor , arranged in the cooking compartment , for determining a current signal curve (AN) of a nitrogen concentration in the cooking compartment , a humidity sensor , arranged in the cooking compartment , for determining a current signal curve (AF) of a humidity concentration in the cooking compartment , a temperature sensor , arranged in the cooking compartment , for receiving a heating curve (AT) of the cooking compartment , a storage unit , in which a plurality of oxygen reference signal curves (R1) for the oxygen concentration in the cooking compartment , a plurality of nitrogen reference signal curves (R2) for the nitrogen concentration in the cooking compartment and a plurality of humidity reference signal curves (R3) for the humidity concentration in the cooking compartment are stored, and a control facility which is designed to determine a residual cooking time (RG) of the food to be cooked by means of a comparison of the determined current signal curves (AO, AN, AF) with the plurality of stored reference signal curves (R1- R3) and as a function of the recorded heating curve (AT), and wherein the control facility is designed to record the signal curves (AO, AN, AF), determined by the sensors during a cooking process carried out by a user, of the oxygen concentration, nitrogen concentration and humidity concentration in the cooking compartment and to store the recorded signal curves as reference signal curves (R1-R3) in the storage unit . <EOS>