Wash the 6-8 medium Russet potatoes and pat them dry with a clean kitchen towel.
Using a fork, carefully pierce the middle of each potato several times to allow steam to escape during cooking.
In a small mixing bowl, combine the 0. 5 tsp. (0. 1 oz / 3g) kosher salt, 0. 5 tsp. (0. 1 oz / 2g) ground black pepper, and 2. 0 tbsp. (1. 0 oz / 28g) olive oil.
Mix the ingredients thoroughly until well blended.
Add the prepared potatoes to the bowl. Use a pastry brush to evenly coat the exterior of each potato with the oil and seasoning mixture.
Pour the 1. 0 cup (8. 0 oz / 240g) water into the inner pot of your Instant Pot.
Place a steam rack directly inside the pot.
Place the seasoned potatoes carefully onto the steam rack. Close the Instant Pot lid, lock it securely into place, and ensure the steam release valve is set to the Sealing position.
Select the MANUAL setting and cook on HIGH pressure for exactly 10 minutes.
Once the 10-minute cooking timer goes off, perform a Quick Release by carefully turning the release valve to the Venting position. Wait until the float valve pin completely drops before safely unlocking and removing the lid.
Transfer the cooked Whole Baked Potatoes to a serving bowl.
Serve immediately, generously topped with butter and fresh dill to taste.
Don't Skip the Piercing: It might seem like a tedious step, but piercing your potatoes with a fork is non-negotiable. It allows the intense steam inside the potato to escape, preventing them from bursting under high pressure.