Pre-heat the oven to 425 degrees.
Wash the potatoes and pat dry.
Place on a baking tray lined with aluminum foil.
Using a fork poke some holes into the top and bottom sides of the potatoes.
Brush the skin with either vegetable oil or olive oil.
Then brush some melted butter onto the skin.
Place in the oven .
Bake for 30 minutes then take the potatoes out of the oven and turn them over.
Bake for another 30 minutes and take the potatoes out and turn them over once again. The potatoes have now been cooking for a total time of 60 minutes. This time stick a fork into them and if they are not yet soft return them to the oven and bake for 20 minutes more.
After the 20 minutes flip them over for the last time and turn off the stove.
Let the potatoes sit in the oven for 30 minutes with the oven turned off and the door closed.
Then take the potatoes out and cut a slit down the center of them.
Cut around the slit to make an opening on the top of the potatoes.
And using a fork fluff the insides of the potatoes.
Top them with butter, sour cream and chives or green onions.
You can also add some shredded cheese or bits of bacon.