My sister makes this 4 ingredient classic for Sunday dinners and the meat is always so tender

To keep the 4-ingredient spirit, most tweaks should build around the same base. If you prefer a slightly tangier sauce, swap half of the sour cream for plain Greek yogurt, keeping the total dairy amount the same. For a more pronounced beef flavor, use condensed cream of chicken or cream of celery soup plus a teaspoon of beef base dissolved in a tablespoon of hot water, folded into the sauce.

If sodium is a concern, choose low-sodium condensed soup and a reduced-sodium onion soup mix, then season at the end to taste. You can add texture by tucking a few sliced onions or mushrooms under the steaks before pouring on the sauce; they’ll soften into the gravy without changing the overall method. For a slow-cooker version, layer the steaks and sauce in the crock, cover, and cook on LOW for 6 to 8 hours until tender, then adjust the thickness of the gravy with a little extra sour cream if needed.

Leftovers reheat beautifully on the stovetop over low heat—just add a splash of water or milk to loosen the sauce and warm gently so the sour cream doesn’t break.