Sour Cream Garlic Potato Flank Steak Crockpot Dinner Tips, FAQ & printable recipe

Tips for success

For the most tender beef, slice the flank steak thinly against the grain before cooking. This shortens the muscle fibers, so they break down more easily during the long simmer.

If the steak is very thick, you can partially freeze it for 20 minutes to make slicing easier. Use a sharp knife to get clean, even strips that will cook uniformly.

The brown gravy mix is the key to the deep color and savory flavor. If you prefer a lower-sodium option, look for a reduced-sodium version or use half the packet and adjust to taste.

You can also add a teaspoon of Worcestershire sauce or a splash of balsamic vinegar for extra depth, though the recipe is delicious as written. Let the slow cooker do the work—no browning or sautéing needed.

Variations

• Mushroom Stroganoff: Add 8 oz sliced cremini mushrooms with the potatoes. The mushrooms will release their liquid and blend into the gravy, adding an earthy depth. Use a gluten-free gravy mix if needed.
• Herb-Infused: Stir 1 teaspoon dried thyme and 1 teaspoon dried rosemary into the sour cream before adding. The herbs will perfume the gravy and complement the beef and potatoes beautifully.
• Spicy Kick: Add 1/2 teaspoon red pepper flakes or a minced jalapeño along with the garlic. The heat will build slowly and balance the tangy sour cream, giving the dish a gentle warmth.
• Vegetarian Version: Replace the flank steak with 2 lb halved cremini mushrooms and use vegetable broth instead of beef broth. Cook on LOW for 4 to 5 hours; the mushrooms will become meaty and the gravy will be rich.

Storage and make-ahead

Fridge

Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat gently, adding a splash of broth or water to loosen the gravy if needed.

Freezer

Freeze in a freezer-safe container for up to 3 months. Thaw overnight in the refrigerator before reheating on the stovetop or in the microwave.

Reheat

Reheat in a covered skillet over medium-low heat, stirring occasionally, until heated through.

Leftovers can be stored in an airtight container in the refrigerator for up to 4 days. The flavors will continue to meld, making the leftovers even more delicious.

Reheat gently on the stovetop or in the microwave, adding a splash of beef broth or water if the gravy has thickened too much. Let the dish cool for no more than 2 hours before refrigerating to keep it safe.

This recipe is ideal for meal prep. Assemble the ingredients in the slow cooker insert the night before, cover, and refrigerate. In the morning, place the insert in the slow cooker base and cook on LOW as directed.

You can also freeze the fully cooked dish for up to 3 months; thaw overnight in the refrigerator and reheat gently. The potatoes may soften slightly after freezing, but the flavor remains excellent.

Serving ideas

Serve this slow cooker steak and potatoes over a bed of warm buttered egg noodles, which soak up the rich gravy beautifully. You can also pair it with mashed potatoes, rice, or crusty bread for sopping up every bit of sauce. A simple green salad with a bright vinaigrette offers a fresh contrast to the hearty richness of the dish.

For a complete meal, add a vegetable side like roasted green beans or steamed broccoli. The gravy is also wonderful over polenta or grits. If you have leftovers, they make a fantastic filling for tacos or a topping for baked potatoes. Garnish with fresh parsley or chives for a pop of color, though the dish is delicious on its own.

Frequently asked questions

Recipe card

Sour Cream Garlic Potato Flank Steak Crockpot Dinner

Prep 10 minCook 6 hTotal 6 h 10 minServes 6

Ingredients

• 2 lb flank steak, thinly sliced against the grain
• 1 1/2 lb baby Yukon Gold potatoes, halved
• 2 tbsp minced garlic
• 1 cup sour cream
• 1 oz brown gravy mix (1 packet)
• Buttered egg noodles, for serving

Instructions

1. Place the thinly sliced flank steak strips in the bottom of a 6-quart slow cooker in an even layer. Scatter the halved baby Yukon Gold potatoes and minced garlic over and around the beef, spreading them evenly so they cook uniformly.
2. Spoon the sour cream over the meat and potatoes, dolloping it in several places. Sprinkle the brown gravy mix evenly over the top. Do not stir—the layers will meld during cooking.
3. Cover the slow cooker and cook on LOW for 6 to 7 hours, or on HIGH for 3 to 4 hours, until the beef is fork-tender and the potatoes are easily pierced with a knife. The gravy will darken and become velvety as it simmers. Let it rest for 3 minutes before slicing.
4. To ensure the beef is safely cooked, insert an instant-read thermometer into the thickest piece of steak. It should read at least 145°F (63°C). Let the meat rest for at least 3 minutes before serving to allow the juices to redistribute.
5. Spoon the beef, potatoes, and gravy over warm buttered egg noodles on individual plates. Use a slotted spoon to portion the solids, then ladle extra gravy on top. Serve hot.

Contains: gluten, milk, eggs

Estimated nutrition per serving

Calories

480

Protein

35 g

Carbohydrates

32 g

Fat

22 g

Automatic estimate from the ingredient list, not laboratory-verified.