A method for treating a food which is in an insulating encapsulation or casing or which will be introduced into same, by ohmic heating. The heating serves to treat sausage products in an intestine, such as Brühwurst (scalded sausage), hot dogs or similar food products. The food is brought into contact with spaced electrically conductive electrodes, wherein the electrodes are connected to a controllable power source. The electrodes are each in the form of at least one first and one second electrode group, wherein the electrode groups are at a distance AEG to one another. Each electrode group has a number of individual electrodes, similar to a comb-like set of needles, wherein the neighbouring individual electrodes of the comb-type set of needles are each at a distance AEE to one another. The respective comb-like set of needles penetrates the insulating encapsulation or the casing of the food.