It depends how you are cooking them and what equipment is being used.
half hour
Usually just enough to heat them thoroughly; a few minutes in a saucepan, less in a microwave.
you cant cook it with butter on it
Potatoes typically take about 45 minutes to 1 hour to cook in the oven at 400F.
Sweet potatoes typically take about 45 minutes to 1 hour to cook, depending on the method used and the size of the sweet potatoes.
Until the potatoes are tender check after 1 hour
Scalloped potatoes typically need to cook for about 45-60 minutes at 400 degrees Fahrenheit.
Scalloped potatoes typically need to cook for about 45-60 minutes at 425 degrees Fahrenheit.
35ocelcius for 1 min
Scalloped potatoes typically need to cook for about 60-75 minutes at 350 degrees Fahrenheit.
Bake potatoes at 350 degrees Fahrenheit for about 60-75 minutes.
How long you bake them depends on how deep they are stacked. In a bowl of six inch deep sliced potatoes, it takes an hour to cook them at 350 degrees Fahrenheit. Thinner slices cook faster than thick slices.