Bake red potatoes at 400°F until cooked through, about 30 minutes.
Let cool enough to handle, then cut each potato in half and scoop out the inside, transferring to a mixing bowl. Make sure to leave the potato skins intact.
Mash up the baked potato with the melted butter in the mixing bowl until there are no large chunks left.
Add roughly ¾ of the crumbled bacon, sour cream, ranch, ½ of shredded cheddar, shaved parmesan, garlic powder, onion powder, smoked paprika, and salt and pepper to the mixing bowl with potatoes, and mix until evenly combined.
Evenly divide the filling between the 10 crispy potato skin halves, making sure to pack it tightly (but without breaking the skin).
Top them all with the remaining shredded cheddar and bacon crumbles and bake for an additional 10-15 minutes until the cheese is golden and bubbly.
Top with a little dollop of sour cream and green onion if desired and enjoy them warm!