01 -
In a large skillet over medium-high heat, brown ground beef with diced onion and minced garlic until fully cooked and lightly crumbled.
02 -
Drain off excess grease from cooked ground beef mixture, then return the skillet to medium heat.
03 -
Add salted butter to the skillet and melt completely. Whisk in all-purpose flour, cooking until the mixture absorbs the butter and turns slightly golden.
04 -
Gradually whisk in beef broth, increasing heat to high. Bring to a boil while whisking vigorously to eliminate lumps and cook until thickened, approximately 2-3 minutes.
05 -
Reduce heat to medium, whisk in sour cream and cream of mushroom soup until fully combined and smooth.
06 -
Add salt and freshly ground black pepper to taste, adjusting seasoning as preferred. If the sauce thickens excessively, thin with a small amount of additional beef broth.
07 -
Return cooked ground beef mixture to the skillet, stirring to combine. Allow to simmer gently for 5 minutes to meld flavors and heat through.
08 -
Spoon the stroganoff over cooked egg noodles and serve immediately.