Preheat oven to 400 degrees F.
While oven is preheating, place butter on a large rimmed baking sheet.
Place in the oven to allow the butter to melt.
When the butter is melted, remove pan from the oven and sprinkle the seasoning salt and garlic powder over the butter.
Use a brush to combine the seasonings on the pan.
Sprinkle Parmesan over top the butter.
Place potatoes cut side down on the butter.
Brush some of the excess butter onto the backs of the potatoes.
Bake 30-40 minutes, depending on the size of your potatoes.
Check the doneness of a potato by poking it with a sharp knife.
Cool for a full 5 minutes before removing from the pan.