Preheat the oven to 425° F. Thoroughly scrub the potatoes clean with water. Pat them dry, then poke several holes with a fork on each side of the potatoes.
8 large russet potatoes
Rub the potatoes in olive oil, coating them completely. Then generously sprinkle the potatoes with coarse sea salt.
2 tablespoon olive oil, 1 tablespoon coarse sea salt
Place the potatoes directly on the middle rack of the oven. Put a baking sheet on a lower rack in the oven to catch any residual olive oil and salt. (This will help keep your oven clean.)
Bake for about 50-60 minutes, or until the center of the potatoes are soft and the exterior is crispy. Check by poking the potatoes through with a fork--if it goes through easily, they're done.
Let the potatoes cool for at least 15 minutes before cutting open the tops. Remove almost all of the inside of the potatoes and add them to a large bowl, leaving just enough for the potato skin to maintain its structure.
Using a hand mixer to break up the large chunks of potato, mix on medium speed for 2-3 minutes. Add the butter, sour cream, milk, salt, garlic powder, and black pepper, and mix on low. Gradually increase speed to medium-high and mix until all of the ingredients are incorporated (2-3 minutes). Taste and add more seasoning if needed.
½ cup unsalted butter, ½ cup sour cream, 1 cup whole milk, 3 teaspoon fine sea salt, ¼ teaspoon garlic powder, ¼ teaspoon ground black pepper
Evenly distribute the mashed potatoes back into the potato skins on a baking sheet. Top with the shredded cheese and either immediately bake or cover with plastic wrap and keep in the refrigerator until ready to bake. (No more than 24 hours.)
¾ cup shredded sharp cheddar cheese
Preheat your oven to 350° F. Remove the plastic wrap and bake the potatoes for 25-30 minutes, or until the potatoes are heated through and the cheese is bubbling.
Add your favorite toppings (optional) and serve immediately.Enjoy! bacon bits, sliced green onions