The answer is yes. But pay attention to the way you thaw and, conversely, the way you freeze. Most foods previously frozen, thawed and then cooked can be refrozen as long as they have not been sitting at room temperature for more than two hours.
You can safely refreeze frozen food that has thawed—raw or cooked, although there may be a loss of quality due to the moisture lost through thawing. To safely refreeze, the thawed product must have been kept cold at 40 degrees or below for no more than 3-4 days.
Make the potatoes according to your recipe, then let cool completely, wrap individually in foil or plastic wrap, place in an airtight freezer bag and freeze for up to 3 months. You can thaw twice-baked potatoes in the refrigerator or reheat them from frozen in the oven or microwave.
The short answer is no. Once frozen the cell structure changes as well as the taste. They will turn black when cooked.
If you've already roasted your potatoes, don't fear, there's hope for them yet! Place your potatoes into a freezer container – either all together, or in separate single-serve portions. Place in the freezer and store for up to four months. Ensure they're thoroughly defrosted before using.
Vegetables such as potatoes, carrots, and parsnips, freeze well and keep their texture. Providing they are frozen correctly (more on that below), they are great to use as a side dish or in salads. Roasted vegetables can be stored in the fridge for around 3-4 days and in the freezer for about 6 months.
Raw potatoes don't freeze well because they contain a lot of water. Instead, it's best to either partially or fully cook potatoes before storing them in the freezer. Properly stored, potatoes can remain in the freezer for up to three months.
The reason behind this is that potatoes have a very high water content which means they don't freeze well and can turn soggy, watery, and potentially gritty once thawed. In fact, if you freeze raw potatoes, each drop of water will crystallize.
This process, which is called oxidation, happens because potatoes are a naturally starchy vegetable. And when exposed to oxygen, starches turn gray, brown, or even black. An oxidized potato is completely safe to eat. The process doesn't affect the flavor or texture of the vegetable.
In terms of food safety, however, so long as you reheat the food at the correct temperature and for the correct duration of time, it can in fact be safely reheated multiple times. However, the Food Standards Agency (FSA) recommends that food is only reheated once, so follow this guidance wherever possible.
Schmidt tells us that, for best results, you can keep mashed potatoes in "a freezer set to 0°F or colder" for "up to one year." At this temperature and for this length of time, frozen mashed potatoes can be thawed and reheated without losing texture or flavor (and without risking the transmission of foodborne bacteria) ...
Mashed potatoes are relatively straightforward to make, but they still take time to prep, and they take up stovetop real estate. While most chefs advocate for making them fresh, mashed potatoes can be made ahead and frozen until ready to use.
Vegetables like cabbage, cucumbers, celery, lettuce, asparagus, and endives should not be refrozen because their texture and flavor are unbearable after defrosting.
Remember that freezing does not kill bacteria, only prevents the microbes from multiplying. So thawed food will have some bacteria that can multiply at room temperature, meaning that if the food is refrozen, there will be an increase in bacterial count by the time it is thawed again.
The U. S. Dept. of Agriculture (USDA) advises: Once food is thawed in the refrigerator, it is safe to refreeze it without cooking, although there may be a loss of quality due to the moisture lost through thawing. After cooking raw foods which were previously frozen, it is safe to freeze the cooked foods.
Got soft beets, carrots, potatoes, radishes, or other root vegetables? Rehydrate your roots to bring them back to life. Simply soak them in water overnight and they should be as firm as new.
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.
Add a Thickening Agent
This is the most common, and perhaps the simplest way, to thicken mashed potatoes. You can use what you have on hand: Flour, cornstarch, or powdered milk are all solid options that are probably already in your pantry.
Are they still good to eat? Because you just put them into the freezer, the cell structure hasn't broken down so while the visual looks bad, they are probably still safe to eat. Same thing happens to onions when frozen from raw.
Storing cooked potatoes
Store in an airtight container in the fridge for 2 days and in the freezer for up to 3 months.
Can you freeze raw potatoes? No, uncooked potatoes do not freeze well. Potatoes need to be pre-cooked before freezing or the texture and flavor will degrade, and the cold temperature will turn the potato black when thawed. Blanching potatoes stops enzyme actions, which can cause loss of flavor, color and texture.
You can freeze just about any vegetable except celery, watercress, endive, lettuce, cabbage, cucumber and radishes. These foods have a high water content and become soggy and water-logged when thawed.
The best vegetables to consider are corn, peas, broccoli, cauliflower, carrots, green beans, squash and winter greens such as spinach, kale, chard and collards. Onions, peppers, celery and herbs can also be frozen.