The Spiral Mixer: The main function of the spiral mixer is to gently mix bread or pizza dough allowing it to develop the proper gluten structure, while not overworking the dough.A spiral mixer is intended only for mixing dough, and it does so through the gentle incorporation of ingredients. The mixer uses two motors — one to rotate the bowl and one to rotate the spiral arm — and a pulley system instead of gears. This results in smooth, quiet mixing action.