Preheat the oven to 200 degrees celcius.
Grease the potato with a bit of oil and season with salt. Cover with foil and bake until soft when you squeeze them. Depending on the size this takes about an hour to an hour and a half.
Remove from the foil and cut open, be careful because they are very hot. Gently scoop out all the potato and put this in a bowl. Be careful though so the potato skin won't tear.
Repeat with all potatoes. Mash the potato filling together with pepper, salt, herb butter, creme fraiche, cheese and chives.
Stuff this back in side the skin of the potatoes. Divide some more cheddar on top and bake again until the cheese has melted, about 5 to 10 minutes.