A packaging includes a first sheet (1), in the form of a receptacle (2) and a second cover sheet (71), for covering the food product (70) and for sealing the receptacle (2). The first sheet (1) is made from a plastic material and the first ends (53a, 53b) of tear-off guide elements are spaced laterally with regard to each other and define a pull tab (58) in a flap (21). The above is of application for example in the cooking of fondue cheese.