01 -
Set oven temperature to 175°C (350°F) to prepare for baking.
02 -
Boil egg noodles following package directions until just al dente, approximately 5 to 7 minutes, then drain.
03 -
In a large skillet, cook ground beef and chopped onion over medium heat until browned and onions are translucent, about 5 to 7 minutes.
04 -
Stir in cream of mushroom soup, sour cream, garlic powder, salt, and pepper until thoroughly combined with beef and onions.
05 -
Gently fold drained egg noodles into the creamy beef mixture until evenly coated.
06 -
Lightly grease a baking dish and transfer the mixture evenly into it.
07 -
Sprinkle shredded cheddar cheese evenly over the top of the casserole mixture.
08 -
Place the baking dish in the preheated oven and bake for 25 to 30 minutes until the cheese is melted and bubbling.
09 -
Remove from oven and let stand for 5 to 10 minutes before serving to allow flavors to settle.