01 -
In a large skillet over medium-high heat, cook ground beef with diced onion and minced garlic until the meat is thoroughly browned and crumbled.
02 -
Drain the rendered fat from the skillet to remove excess grease, then return the pan to medium heat without adding beef back yet.
03 -
Add salted butter to the pan and melt completely. Whisk in all-purpose flour and cook to absorb the butter, creating a roux.
04 -
Gradually whisk in beef broth, increasing heat to high, and bring to a boil. Stir continuously for 2-3 minutes until the mixture begins to thicken.
05 -
Reduce heat to medium and whisk in sour cream and cream of mushroom soup until combined thoroughly.
06 -
Season with salt and black pepper to taste, adjusting seasoning gradually and adding extra broth if mixture thickens too much.
07 -
Return the drained ground beef to the skillet, stir well to incorporate, and allow to simmer for 5 minutes to meld flavors.
08 -
Plate the stroganoff over cooked egg noodles and serve immediately.