The invention concerns apparatus and a method for the quantification of the stretchability of molten cheese, typically mozzarella cheese, on a pizza pie. The apparatus includes a first platform (1) having clamps (11) by means of which one part (7) of the pizza base (5) is affixed to the first platform (1). The other part (8) of the pizza base (5) is affixed to a second platform (2) by a clamp (12). The second platform (2) is mounted on a wheeled bogey which is drawn along rails by a winch driven by an electric motor for moving the second platform (2) relative to the first platform (1), at a constant velocity, in a horizontal plane, to draw the two parts (7, 8) of the pizza base apart thereby stretching the mass of cheese into strands (13). Means are provided for measuring the distance travelled by the second platform (2) at breakage of the cheese strands.