01 -
Preheat oven to 375°F. Grease a 9x13-inch baking dish with butter or non-stick spray to prevent sticking.
02 -
Peel and slice potatoes into thin, even rounds. Aim for uniform thickness to ensure even cooking.
03 -
In a large skillet over medium heat, cook ground beef and chopped onion until beef is browned and onions are soft, about 5-7 minutes. Drain off excess grease.
04 -
Season beef and onions with garlic powder, onion powder, salt, and black pepper. Stir to ensure even distribution of seasoning.
05 -
Place half of the sliced potatoes in an even layer on the bottom of the prepared baking dish. Spread half of the beef mixture evenly over potatoes. Repeat layers with remaining potatoes and beef mixture.
06 -
In a small bowl, combine cream of mushroom soup and milk. Mix until smooth and pour evenly over layered casserole, ensuring it seeps into all layers.
07 -
Sprinkle shredded cheddar cheese evenly over the top of the casserole. Drizzle melted butter over cheese for a rich, golden finish.
08 -
Cover dish with aluminum foil and bake for 45 minutes. Remove foil and bake for 15 minutes longer, or until cheese is bubbly and lightly golden.
09 -
Remove casserole from oven and let rest for 5-10 minutes before serving to help layers set. Sprinkle with paprika if desired.