Hand mixers do not mash potatoes, but instead, whip them.
There are several reasons why mashed potatoes have lumps:
- Potatoes may not be thoroughly cooked.
- Potatoes vary significantly, and there can be tough spots in them.
- Different types of potatoes will yield different results.
Tip: Try cooking the potatoes longer and/or smashing the tough spots with a fork.
Put the beaters into the freezer for 10 minutes before whipping. 9 - Speed Hand Mixers have a professional whisk that may help, or you may purchase the whip for any other model.