Tender beef-and-pork meatballs simmer in a creamy, savory gravy in the slow cooker for a cozy, low-effort dinner. Serve over noodles, mashed potatoes, or rice for classic comfort.
If short on time, you can skip browning and add meatballs directly to the slow cooker. Temper sour cream by whisking in some hot gravy before adding; keep heat low after adding dairy to avoid curdling. For frozen meatballs, cook on LOW 5–6 hours or HIGH 3–4 hours before adding sour cream. Variations: use turkey or chicken with added oil, gluten-free breadcrumbs and cornstarch slurry, or dairy-free alternatives. To store, refrigerate up to 4 days or freeze up to 3 months; reheat gently and loosen with broth or milk.