Tender chunks of beef simmer low and slow in a rich, savory mushroom gravy until luxuriously fork-tender, then finished with a velvety swirl of sour cream. This slow-cooker rendition delivers classic comfort-food depth with minimal hands-on effort, perfect over egg noodles or mashed potatoes.
Storage: Store leftover stroganoff in an airtight container in the refrigerator for up to 4 days. The sauce may thicken as it sits. Freezing: Freeze without the sour cream added if possible, as sour cream can become grainy when thawed. For fully cooked stroganoff, freeze and thaw overnight, then gently reheat and stir in a splash of broth to restore consistency. Reheating: Reheat on the stovetop over medium-low heat, stirring occasionally, until warmed through (about 165°F internal). Add a splash of beef broth or milk to thin if needed. You can also microwave individual portions on high in 30-second intervals, stirring between. For best texture, avoid boiling the sauce after the sour cream has been added.
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