Preheat oven to 350°. Cut baked potatoes into 1-in. cubes. Place half in a greased 13x9-in. baking dish. Sprinkle with half of the salt, pepper and bacon. Top with half of the sour cream and cheeses. Repeat layers.
Bake, uncovered, 20-25 minutes or until cheeses are melted. Sprinkle with onions.
How to Check If Your Oven Is Working Properly
Test Kitchen Tips
Warm potatoes can be tough to cut, and they don't hold their shape. Cool completely before cubing them.
This is a rich recipe worthy of special occasions, but you can shave a few calories by reducing the sour cream and cheese. Try 2 cups of sour cream and 3 cups total of shredded cheese.