The aim of the invention is to provide a healthier product which contains less fat and no allergens and which, once cooked in a microwave appliance, is crunchy and does not stick together, such that the resulting popcorn is as homogeneous as possible. For this purpose, according to the invention, instead of coating the corn kernels with oils during treatment, they are instead coated with sunflower lecithin, a much healthier product that can be used to achieve the results mentioned above.