Creamy Baked Mashed Potatoes

These truly are the creamiest, tastiest mashed potatoes.  Yes, there's a ton of butter involved, along with cream cheese and heavy cream.  So this is definitely not good for your waistline.  But it's a nice indulgence once in a while.  Enjoy!
-2 sticks unsalted butter, softened, divided
-5 lbs potatoes
-8 oz cream cheese, softened
-1 cup heavy cream
-1 tsp seasoned salt
-1/2 tsp salt
-1 tsp pepper
Preheat oven to 350 F.  Generously coat a 9x13 pan with the butter cooking spray.  Set aside.
Peel and cut the potatoes into chunks.  Boil until fork tender.  Drain.  Return to the stove and mash over low heat until all the steam is gone.  Turn off the heat and add 1 1/2 sticks butter and the rest of the ingredients.  Mash and mix well.
Pour mixture into prepared pan.  Cut the remaining butter into small chunks and spread all over potatoes.
Bake in preheated oven for about 25 minutes.  Enjoy!
Slightly adapted from a recipe courtesy of Ree Drummond.