This 3-ingredient slow cooker longest day supper is built for those evenings when you’re exhausted but still want something genuinely comforting on the table. It leans on humble Midwestern pantry staples—cubed steaks, a creamy condensed soup, and a packet of dry onion soup mix—to create fork-tender beef in a rich, savory gravy. Everything goes into the crock raw, no searing or fuss, and the long, low cook transforms budget-friendly cubed steaks into a meal so satisfying it tends to make repeat appearances on the weekly menu.
Serve the cubed steaks and their creamy gravy over fluffy mashed potatoes, buttered egg noodles, or steamed white rice to catch every bit of sauce. A simple green side—like steamed green beans, a tossed salad, or roasted broccoli—balances the richness nicely. Warm dinner rolls or crusty bread are great for mopping up the extra gravy, and if you’d like something bright to finish, a crisp cucumber salad or sliced tomatoes with a sprinkle of salt works beautifully.
3-Ingredient Slow Cooker Cubed Steak SupperServings: 4
Ingredients
2 pounds beef cubed steaks, raw
2 (10.5-ounce) cans condensed cream of mushroom soup (undiluted)
1 (1-ounce) packet dry onion soup mix
Directions
Lay the raw beef cubed steaks in a single, mostly even layer on the bottom of a 4- to 6-quart slow cooker. It’s fine if they overlap slightly, but try to keep them fairly flat so they cook evenly and stay tender.
In a medium bowl, stir together the condensed cream of mushroom soup and the dry onion soup mix until the mixture is mostly smooth and the onion soup mix is evenly distributed.
Spoon or dollop the creamy soup mixture evenly over the cubed steaks in the slow cooker, covering the meat as much as possible. The mixture will look thick at this stage; it will loosen and turn into a gravy as it cooks and mingles with the beef juices.
Cover the slow cooker with the lid and cook on LOW for 6 to 8 hours, or on HIGH for 3 to 4 hours, until the cubed steaks are very tender and easily cut with a fork. Avoid lifting the lid frequently, as this releases heat and can lengthen the cooking time.
Once the cubed steaks are tender, taste the gravy and adjust the seasoning if needed. Depending on your onion soup mix, you may not need any additional salt; add a little freshly ground black pepper if you like.
Serve the cubed steaks hot, spooning plenty of the creamy onion-mushroom gravy over each portion. Pair with your favorite starch and a vegetable side for a complete meal.
Variations & Tips
To keep the 3-ingredient spirit but add a little nuance, you can swap the cream of mushroom soup for cream of chicken or cream of celery soup—each will shift the flavor slightly but keep the same rich, comforting texture. If you’d like a milder onion flavor, use half the packet of onion soup mix and taste at the end before adding more. For a bit of extra depth without adding new ingredients, brown the cubed steaks quickly in a hot skillet before placing them in the slow cooker; this step is optional but adds a little caramelized flavor. If you prefer a thicker gravy, remove the lid for the last 20 to 30 minutes of cooking on HIGH to let some liquid evaporate, or stir in a slurry of 1 tablespoon cornstarch mixed with 1 tablespoon cold water and cook until thickened. Food safety tips: Always start with fully thawed cubed steaks; don’t put frozen beef directly into the slow cooker, as it can stay too long in the temperature “danger zone.” Keep the slow cooker covered during cooking to maintain a safe, steady temperature. Leftovers should be cooled quickly, transferred to shallow containers, and refrigerated within 2 hours; use within 3 to 4 days, reheating to at least 165°F before serving. If you want to stretch the meal, shred leftover cubed steaks into the gravy and serve over toast or baked potatoes for an easy second-night dinner.
