Slow Cooker Cream of Mushroom Beef Steak

Tender, juicy beef steaks slowly cooked in a rich and creamy mushroom gravy—this slow cooker cream of mushroom beef steak is the ultimate comfort food. The slow cooker transforms the beef into a fork-tender, flavourful meal, while the cream of mushroom sauce creates a delicious gravy perfect for serving over mashed potatoes, rice, noodles, or vegetables.

This recipe is ideal for busy days because the slow cooker does most of the work. Simply prepare the ingredients, add them to your slow cooker, and return later to a warm, satisfying homemade meal.

Recipe Details

Servings: 4–6
Prep Time: 15 minutes
Cook Time: 6–8 hours on LOW or 3–4 hours on HIGH
Total Time: Approximately 6–8 hours

Ingredients

For the Beef

4–6 beef steaks, about 2 pounds total
1 teaspoon salt
½ teaspoon black pepper
1 teaspoon garlic powder
1 teaspoon onion powder
1 tablespoon olive oil, optional for searing

For the Creamy Mushroom Sauce

2 cans (10.5 ounces each) cream of mushroom soup
1 cup beef broth
1 packet onion soup mix, optional
8 ounces fresh mushrooms, sliced
1 medium onion, thinly sliced
3 cloves garlic, minced
1 teaspoon Worcestershire sauce
½ teaspoon dried thyme
½ teaspoon dried parsley
¼ teaspoon black pepper

Optional for a Thicker Gravy

1 tablespoon cornstarch
2 tablespoons cold water

Optional Garnishes

Fresh parsley, chopped
Extra sliced mushrooms
Fresh thyme

Instructions

Step 1: Season the beef.

Pat the beef steaks dry with paper towels. This helps the seasonings stick better and can improve browning if you choose to sear the meat.

Season both sides of the steaks with salt, black pepper, garlic powder, and onion powder.

You can use different cuts of beef for this recipe, but steaks that benefit from slow cooking tend to become especially tender and flavourful.

Step 2: Optional—Sear the Steaks

This step is optional but highly recommended for extra flavour.

Heat the olive oil in a large skillet over medium-high heat.

Add the seasoned steaks and sear them for approximately 1–2 minutes per side, just until they develop a golden-brown crust.

You do not need to cook the steaks completely because they will finish cooking in the slow cooker.

Transfer the seared steaks to the slow cooker.

If you’re short on time, you can skip this step and place the seasoned steaks directly into the slow cooker.

Step 3: Prepare the Mushroom Sauce

In a medium bowl, combine:

Cream of mushroom soup
Beef broth
Onion soup mix, if using
Worcestershire sauce
Dried thyme
Dried parsley
Black pepper

Whisk everything together until smooth.

The mixture may look thick at first, but it will loosen as it cooks with the beef and vegetables.

Step 4: Layer the Ingredients

Place the sliced onions, fresh mushrooms, and minced garlic in the bottom of the slow cooker.

Arrange the seasoned or seared beef steaks on top.

Pour the cream of mushroom sauce evenly over the steaks.

Use a spoon to gently spread some of the mushrooms and sauce around the meat.

Step 5: Slow Cook

Cover the slow cooker with the lid.

Cook on:

LOW: 6–8 hours
HIGH: 3–4 hours

For the most tender result, cooking on LOW is generally recommended.

Cooking times can vary depending on the thickness and cut of beef, as well as your particular slow cooker.

The beef should be tender and cooked to a safe internal temperature.

Step 6: Make the Gravy Thicker if Needed

After the beef has finished cooking, check the consistency of the mushroom gravy.

If you prefer a thicker sauce, mix the following:

1 tablespoon cornstarch
2 tablespoons cold water

Stir until completely smooth.

Remove the stakes temporarily if desired, then stir the cornflour mixture into the hot sauce.

Cover and cook on HIGH for another 10–15 minutes, or until the gravy thickens.

Return the steaks to the slow cooker and spoon the creamy mushroom gravy over the top.

Step 7: Serve

Carefully remove the tender beef steaks from the slow cooker.

Spoon plenty of the creamy mushroom and onion gravy over each serving.

Garnish with freshly chopped parsley or thyme if desired.

Serve immediately while warm.

What to Serve with Cream of Mushroom Beef Steak

This rich and creamy beef dish pairs beautifully with many side dishes.

Mashed Potatoes

Creamy mashed potatoes are one of the best choices because they absorb the delicious mushroom gravy.

Rice

Serve the beef and gravy over fluffy white rice, brown rice, or cauliflower rice.

Egg Noodles

Wide egg noodles are another comforting option that pairs perfectly with the creamy sauce.

Roasted Vegetables

Try serving this dish with roasted

Carrots
Green beans
Broccoli
Asparagus

Low-Carb Options

For a lower-carbohydrate meal, serve the beef with:

Cauliflower mash
Steamed green beans
Roasted zucchini
Sautéed spinach

Recipe Notes

Choose the Right Cut of Beef

Not every steak is ideal for long, slow cooking.

Cuts such as round steak, chuck steak, cube steak, or other tougher cuts generally become tender during slow cooking.

Very lean and expensive steaks can become dry if cooked for many hours.

Fresh mushrooms add extra flavour.

The canned soup provides a creamy mushroom base, but fresh mushrooms add better texture and a richer homemade flavour.

White button mushrooms or cremini mushrooms both work well.

Don’t Add Too Much Liquid

The slow cooker traps moisture, and the beef and vegetables release additional juices while cooking.

Start with the recommended amount of broth rather than adding extra liquid.

Season Carefully

Cream of mushroom soup and onion soup mix may already contain a significant amount of sodium.

Taste the gravy near the end of cooking before adding additional salt.

Helpful Tips for the Best Results

1. Cook on LOW for Maximum Tenderness

When you have enough time, low heat allows tougher cuts of beef to slowly soften and become tender.

2. Sear for Deeper Flavor

Searing is optional, but it creates a richer beef flavour and improves the overall appearance of the finished dish.

3. Slice Mushrooms Evenly

Try to slice the mushrooms into similar sizes so they cook evenly.

4. Let the Sauce Rest Briefly

After cooking, allow the dish to sit with the lid slightly open for a few minutes before serving. This can help the sauce settle and thicken naturally.

5. Add Fresh Herbs Before Serving

Fresh parsley or thyme adds a bright, fresh flavour that balances the richness of the creamy mushroom sauce.

Storage and Reheating

Allow leftovers to cool before placing them in airtight containers.

Store in the refrigerator and use within 3–4 days.

To reheat, place the beef and gravy in a covered pan over low heat until warmed through.

You can also reheat individual portions in the microwave.

If the sauce becomes too thick after refrigeration, add a small splash of beef broth or water while reheating.

Can You Freeze This Recipe?

Yes, this dish can be frozen.

Allow the beef and gravy to cool completely, then transfer to freezer-safe containers.

Freeze for up to 2–3 months for best quality.

Thaw overnight in the refrigerator before reheating.

Because creamy sauces can sometimes change texture after freezing, stir the gravy well while reheating.

Nutritional Information

Approximate nutrition per serving, based on 6 servings:

Calories: 380–450 kcal
Protein: 35–42 g
Carbohydrates: 10–15 g
Fat: 22–28 g
Fiber: 1–2 g
Sugar: 3–5 g

Nutritional values are estimates and will vary depending on the cut of beef, brand of cream of mushroom soup, and serving size.

Frequently Asked Questions

Can I use frozen beef steaks?

For food safety and even cooking, it is generally best to thaw beef completely in the refrigerator before placing it in a slow cooker.

Can I use homemade mushroom sauce?

Absolutely. You can make a homemade mushroom cream sauce using sautéed mushrooms, onions, broth, and a creamy base.

Can I make this without onion soup mix?

Yes. Simply leave it out and add additional herbs and seasonings to taste.

Can I use milk instead of beef broth?

Beef broth provides a deeper savoury flavour. Milk may make the sauce creamier, but it can change the consistency and flavour.

Why is my steak tough?

Tougher cuts of beef may need additional time to break down and become tender. If the beef is still tough, continue cooking and check again later.

Can I add vegetables directly to the slow cooker?

Yes. Carrots, potatoes, green beans, and other sturdy vegetables can be added. Keep in mind that they may change the amount of liquid and cooking time.

Final Thoughts

Slow Cooker Cream of Mushroom Beef Steak is an easy, comforting meal that combines tender, slow-cooked beef with a rich, savoury mushroom gravy.