According to the rules proposed by the Associazione Vera Pizza Napoletana, the genuine Neapolitan pizza dough consists of wheat flour (type 0 or 00, or a mixture of both), natural Neapolitan yeast or brewer's yeast, salt and water. For proper results, strong flour with high protein content (as used for bread-making rather than cakes) must be used. The dough must be kneaded by hand or with a low-speed mixer. After the rising process, the dough must be formed by hand without the help of a rolling pin or other machine, and may be no more than 3 millimeters (0.12 in) thick. The pizza must be baked for 60–90 seconds in a 485 °C (905 °F) stone oven with an oak-wood fire. When cooked, it should be soft, elastic, tender and fragrant.