Warm the milk in a small saucepan before incorporating it into your mash. When you melt butter on the stove, its milk solids and fat separate. Adding cold butter to your potatoes will allow the butter to melt as a whole and distribute the fat and milk solids evenly.
Do NOT add cold liquid. Make sure the milk or cream you add to your potatoes is HOT. This helps it absorb better so you don't feel the need to overmix. Overmixing is bad.
A word about butter: Don't melt butter before stirring it into the potatoes because the milk solids and fat will separate. You can add cold butter to your hot potatoes since the butter will melt as a whole and distribute the fat and milk solids evenly.
Tip #4: Never try to mash up cold potatoes. It has to do with some chemical-y thing with the starch. If your potatoes go cold, heat them up again (in warm water, a microwave) and then try to mash them.
The Mistake: Overworking the Potatoes with a Food Processor, Blender or Mixer. Too much — or too vigorous — mashing will produce gluey potatoes. Your best tool is an old-fashioned masher, fork, ricer or food mill.
There are many ways restaurants keep mashed potatoes warm and ready to serve. Aside from using a slow cooker, they use a warming drawer, insulated containers, crock pot, and the covered double broiler method.
Once you've got hot potatoes, you're almost ready to mash. Drain out any remaining water, add butter and milk and put the lid back on. The potatoes and warm pot will melt the butter and heat the milk. Let them sit for three to five minutes, then mash.
Melted or liquid butter will thin out your batter, giving you ultra-flat cookies or cakes that are dense and uneven.
Butter helps make the starchy texture of potatoes richer and eliminates that "cling" some potatoes get when they're freshly mashed. You shouldn't let butter be the only dairy you use, however.
Skip the whole milk and go for half-and-half or cream.
Liquid dairy is what makes mashed potatoes luscious and creamy. Since it's Thanksgiving, splurge a little and use half-and-half or splurge a lot and use cream.
Thus, you don't have to boil milk for safety reasons unless it's raw, unpasteurized milk. In that case, bringing it to a boil or near a boil will significantly reduce most bacteria levels sufficiently ( 1 ). People often boil milk when they use it in cooking. You can boil raw milk to kill any harmful bacteria.
They absorb liquids brilliantly, which is why they mash so well. But when you boil them in water, the liquid they are absorbing is just that, water, which can make for a less flavorful mash. By boiling the potatoes in salted milk, they are absorbing creaminess and seasoning, which makes them inherently more flavorful.
If you find your mashed potatoes are soupier than normal, it's likely because you overcooked them, Buzzfeed says. Overcooked potatoes aren't always dry and hard, as it's possible to overboil a potato too.
Follow this tip: Begin the process of seasoning your mashed potatoes by adding salt to the water when cooking the potatoes. You won't have to add as much salt later and, most importantly, you won't find yourself with bland potatoes.
For most potato dishes it's important to add the potatoes to cold water and allow the water to come to a boil with the potatoes in the water. The potato starch can react as soon as it comes in contact with hot water, which will promote uneven cooking and mealy potatoes.
Reheat on the Stovetop
She says to store them in a heatproof bowl after cooking; when it's time to warm them up, place the bowl over a pot of simmering water. Add an extra splash of cream or milk, and another pat of butter to ensure the mashed potatoes don't dry out.
When time is limited and mashed potatoes are a "must have" on the menu (which is always), keep the prepared potatoes warm by placing them in a heat-resistant bowl, covering, and setting it over a pot of simmering water. The potatoes should still be tasty 2 to 3 hours later.
Make-ahead mashed potatoes are a great option for the holidays. You can do nearly everything — boil, peel, and mash; stir in milk and salt — up to two days ahead. Before serving, reheat. Adding butter at the last minute makes them taste freshly mashed.
If kept warm, gently mash in heavy cream until smooth and loose again, adding more if you'd like. If cold, heat the cream in a large pot until steaming, then add the potatoes. Gently mash and whip, adding more cream as needed, until heated through and fluffy.
Fix them: Scoop the watery mashed potatoes into a pan and stir constantly over low heat to evaporate the excess liquid. If the potatoes are really watery, you can add either cornstarch or instant mashed potatoes a half teaspoon at a time to help the spuds thicken to your preferred consistency.
Here's how to do it: For every pound of potatoes in your mash, drizzle 1 tablespoon of melted butter over the dish and fold it gently into the potatoes. If the mash is still too gluey for your liking, repeat the process with another tablespoon of butter.