Essentially, if the device doesn't have an induction motor, or use the mains frequency for timing, you should be OK.
In my experience, kitchen appliances use universal motors, that can be run on both AC and DC (basically). They motor speed with these is dependent on the current. However, because the motors do use coils, the current might be a bit higher, due to the lower impedance.
As someone mentioned before, you should check each case. But keep the frequency dependance in mind.