If baking in a conventional oven, the time is not changed whether cooking 1 or 12 potatoes - about 45 minutes at 400 degrees. Test for doneness by piercing with a fork, as smaller potatoes will be done more quickly. If baking in a microwave, you do need to add more time for additional potatoes. The timing will also be effected by the size of the potatoes, as well as the type of microwave itself. 12 large potatoes would fill up a standard microwave. I would begin with 20 minutes, testing the potatoes for doneness every minute after that.
Yes. Baked potatoes are usually cooked at 400o C for 1 hour while most cakes bake at 350o C. You will simply need to adjust your baking time for the potato, adding approx. 20 min. Alternately you can increase the baking temp when the cake is removed and adjust your time by about only 10 min.
Preferably every time.
the same time as baking 1 potato if your oven is large enough
No. When baking with a glass pan, the temperature is reduced from 350 degrees to 325 degrees, but the baking time is not lengthened.
Well, honey, you can't just double the cooking time when you double the recipe for scalloped potatoes. You need to keep an eye on those taters and adjust the cooking time as needed based on how they're looking. Just use your common sense and a fork to test if they're done - no need to make things more complicated than they need to be!
This will depend on the size of the potatoes and the heat of the oven. If you want to bake potatoes in their jackets a useful technique is to push a metal knife (It must be completely metal like a stainless steel dining knife with no bone or plastic handles) or metal skewer right through or at least into the middle of each potato - the metal will conduct the heat into the centre of the potato and this will reduce the cooking time. If the potatoes are large you may want to halve or quarter them and place them on a baking tray. Peeling the potatoes and cutting them into smaller portions will also reduce baking time. If you pack them close together they will take longer to cook, so space them out. Generally about 30 - 40 minutes in a moderate oven should be enough to bake a medium sized potato. Unless you have a small oven, or are baking something else in the oven at the same time, it is not a cost effective way of cooking potatoes.
To efficiently prepare a dish involving par-cooking potatoes, first peel and cut the potatoes into uniform pieces. Boil them in salted water until slightly tender, then drain and cool them. When ready to use, finish cooking the potatoes by roasting, frying, or baking them according to your recipe. This method saves time and ensures the potatoes are cooked through in the final dish.
The only way to reduce the salty taste is to add more of the main ingrediants. In this case add more milk a bit at a time tasting the potatoes until you have the right amount of saltiness. You may need to add more precooked potatoe's to prevent from turning it into potato soup.
atmospheric pressure is low
When a potato is fresh it should be smooth, well shaped, and unbruised. When selecting potatoes, choose new potatoes for boiling and salads. They have thinner skins and are firmer. With new potatoes, look for firm potatoes that are free from blemishes and sunburn (a green discoloration under the skin). Some amount of skinned surface is normal, but potatoes with large skinned and discolored areas are undesirable. For general-purpose and baking potatoes, look for reasonably smooth, firm potatoes free from blemishes, sunburn, and decay.
It would take at least 40-45 minutes to an hour to bake a large potato at 450 degrees. I often cut down the baking time to maybe 30 minutes by cutting the potato in half the long way before baking. Be sure to oil the cut side, and place it cut side down on a baking sheet. The skin side up should also be oiled (as well as pricked with holes as usual). The cut side will get brown, so don't overbake it or it will be too dark.