Alkali is added for puffiness, brittle outside and soft inside. The formula of sesame seed cake (cylinder furnace, hanging furnace and iron plate) is: superfine powder 10 kg, yeast 100 g, pastry 50- 100 g, sugar 150 g, ethyl maltol 2 g and water 5.5 kg. Ferment for 30-50 minutes (normal temperature fermentation 1-2 hours). Then, the dough is divided into150-160g, kneaded and divided into two doughs, one of which is made of five-spice powder, edible salt and maltol. And pack another one.