PURPOSE: To enable production of almost ideal dough for noodle and cake by generating steam by blowing water into an evacuated atmosphere, sticking the steam uniformly to suspended powder, and feeding the moistened powder to a mixer.

CONSTITUTION: A powder feeding mechanism 1, 2 and a water feeding mechanism 6 are provided to a main body 3 of an apparatus installed with a stirring means 4, and a vacuum pump 8 for evacuating the inside of the main body 3 of the apparatus is also provided. When a fixed amt. of powder is fed from the mechanisms 1, 2 to the main body 3, the powder suspends freely in the main body 3 by the effect of the means 4. On one hand, when water is fed to the main body 3 from the mechanism 6, the water is evaporated at once due to the evacuated condition in the main body 3, and the steam moves in the main body 3 in the suspended state. In this way, the powder and water are uniformly dispersed by the stirring effect of the means 4, agglomerated by collision with each other and are collected in the bottom of the main body 3. Obtd. moistened powder is transported to a mixer where almost ideal dough for noodle or cake is produced.