Preheat your oven to 400°F (200°C). This temperature is perfect for baking the potatoes until tender and crisping up the skins beautifully.
Start by washing the russet potatoes thoroughly under running water to remove any dirt. Pat them dry with a clean towel. Using a fork, prick each potato several times to allow steam to escape while baking.
Place the potatoes directly on the oven rack or on a baking sheet. Bake for 45 to 60 minutes, depending on their size, until the potatoes are soft when pierced with a fork. The skin should be firm but not burnt.
Remove the potatoes from the oven and let them cool for about 10 minutes until they are safe to handle. Cut each potato in half lengthwise.
Using a spoon, carefully scoop out most of the potato flesh, leaving about ¼ inch of potato attached to the skin. You can save the scooped-out potato for another use, like mashed potatoes or soup.
Brush the potato skins with olive oil, ensuring each skin is evenly coated. Sprinkle salt and ground black pepper over the skins to season.
Place the potato skins back onto the baking sheet, skin side down. Bake for an additional 10 to 15 minutes, or until the skins are crispy and golden brown.
Remove from the oven and let cool slightly before serving. These crispy potato skins are delicious on their own or topped with your favorite ingredients.