For the potato layers
01 -
5 lb (2.25 kg) Yukon Gold potatoes, peeled or unpeeled, sliced 1/4 inch thick
02 -
3 cups (340 g) freshly shredded sharp cheddar cheese, divided
03 -
1/2 cup (75 g) yellow onion, finely diced
04 -
1 tablespoon (14 g) unsalted butter, for the onion
For the creamy sauce
05 -
1 (10.5 oz / 298 g) can condensed cream of mushroom soup
06 -
1 cup (240 g) sour cream
07 -
4 tablespoons (56 g) unsalted butter, melted
08 -
1/3 cup (80 ml) whole milk
09 -
1 teaspoon garlic powder
10 -
1/2 teaspoon smoked paprika
11 -
1 teaspoon kosher salt, plus more to taste
12 -
1/2 teaspoon black pepper
For serving
13 -
2 tablespoons chopped green onions or parsley
14 -
Cooked crumbled bacon, optional