Rub each washed potato with olive oil - put some oil on a paper towel to rub on the potato
Sprinkle the potato with sea salt
Bake the potatoes, on a baking sheet, in a 400-degree oven for an hour or more - until the potatoes are soft when squeezed or pricked with a fork
Lower the oven temp to 300 degrees
You can wait for the potatoes to cool or use oven mitts while you slice an opening in each potato
Scoop out the baked potato, leaving the shell intact
Transfer the scooped out potato to a large bowl for mashing
Add salt, pepper, butter, and sour cream
Mash the potato mixture until it is smooth
optional - For Ultimate Loaded potatoes - add 1 cup of shredded cheddar cheese and about 1/2 cup of crumbled bacon to the potato mixture before stuffing the potato
Fill the shell of the potatoes with the mashed potatoes
Pop the potatoes back into the oven to warm through - about 30 minutes