Easy Beef & Mushroom Casserole

A cozy, creamy comfort-food dinner made with tender beef stew meat, cream of mushroom soup, and just a few simple ingredients. This easy casserole is perfect for busy weeknights when you want a hearty homemade meal without a lot of prep.

There are some dinners that become family favorites simply because they are so easy. This Beef & Mushroom Casserole is one of them.

With tender beef stew meat, creamy mushroom soup, and a handful of pantry staples, you can have a warm and satisfying dinner baking in the oven with very little hands-on work. The beef cooks slowly in the creamy sauce, creating a rich, comforting dish that pairs beautifully with mashed potatoes, rice, or egg noodles.

If you love simple casseroles, cozy beef recipes, and easy weeknight dinners, this is one to keep in your recipe collection.

Why You’ll Love This Beef Casserole

Easy preparation: Just combine the ingredients and let the oven do most of the work.
Simple ingredients: You don’t need a long grocery list.
Comforting and hearty: Tender beef and creamy mushroom sauce make a satisfying meal.
Great for busy nights: Minimal prep makes this an excellent weeknight dinner.
Family-friendly: Serve it over potatoes, rice, or noodles for a complete meal.

Ingredients

For this easy beef and mushroom casserole, you’ll need:

2 pounds beef stew meat
1 can (10.5 ounces) cream of mushroom soup
1 packet dry onion soup mix
1/2 cup beef broth
1/2 teaspoon garlic powder
1/2 teaspoon black pepper
1 tablespoon Worcestershire sauce, optional
Fresh parsley, optional, for garnish

What Kind of Beef Should You Use?

Beef stew meat is ideal because it is designed for slow, moist cooking. You can also cut a beef chuck roast into bite-sized pieces if that’s what you have available.

Try to cut the beef into pieces of similar size so they cook more evenly.

How to Make Beef & Mushroom Casserole

Step 1: Prepare the Oven

Preheat your oven to 325°F (165°C).

Lightly grease a large glass or ceramic casserole dish with cooking spray or a small amount of oil.

Step 2: Add the Beef

Place the raw beef stew meat evenly in the casserole dish.

There is no need to brown the beef first for this easy version. Keeping the preparation simple is part of what makes this recipe so convenient.

Step 3: Make the Creamy Sauce

In a medium bowl, combine:

Cream of mushroom soup
Beef broth
Dry onion soup mix
Garlic powder
Black pepper
Worcestershire sauce, if using

Stir until everything is well combined.

Step 4: Pour Over the Beef

Pour the mushroom mixture evenly over the beef.

Use a spoon or spatula to gently spread the sauce so the beef is well covered.

Step 5: Cover and Bake

Cover the casserole dish tightly with aluminum foil.

Place it in the preheated oven and bake for approximately 2 to 2½ hours, or until the beef is tender.

Cooking time can vary depending on the size of the beef pieces and your oven, so check that the beef has reached a safe temperature and is tender before serving.

Step 6: Rest and Serve

Carefully remove the casserole from the oven.

Let it rest for about 10 minutes, then stir the creamy sauce gently.

Sprinkle with fresh parsley if desired and serve warm.

What to Serve With Beef & Mushroom Casserole

This creamy beef casserole is delicious with simple side dishes.

Mashed Potatoes

Creamy mashed potatoes are one of the best choices because they soak up the mushroom gravy beautifully.

Egg Noodles

Serve the beef and sauce over warm egg noodles for a comforting meal similar to a simple beef stroganoff.

White Rice

Steamed white rice is an easy option that helps stretch the meal and works wonderfully with the creamy sauce.

Roasted Vegetables

Add roasted carrots, green beans, broccoli, or Brussels sprouts for a vegetable side.

Dinner Rolls

Warm dinner rolls are perfect for soaking up every bit of the savory mushroom sauce.

Tips for the Best Beef Casserole

Don’t cut the beef pieces too small. Larger bite-sized pieces are less likely to dry out during the long cooking time.

Cover the casserole tightly. Keeping the dish covered helps retain moisture while the beef cooks.

Don’t rush the cooking time. Beef stew meat becomes more tender with slow cooking.

Check the sauce. If the sauce becomes thicker than you prefer, you can stir in a small amount of additional beef broth before serving.

Let it rest. Giving the casserole a few minutes to rest allows the sauce to settle and makes serving easier.

Easy Variations

Want to change things up? Try one of these simple variations.

Add Mushrooms

For extra mushroom flavor, add sliced fresh mushrooms before baking.

Add Vegetables

Diced carrots, peas, or green beans can turn this into a more complete one-dish dinner.

Add Cheese

For a richer casserole, sprinkle shredded cheddar or mozzarella over the top during the final few minutes of baking.

Make It Extra Garlicky

Add a little minced fresh garlic along with the garlic powder for additional flavor.

Add Sour Cream

For a stroganoff-inspired variation, stir a small amount of sour cream into the finished sauce just before serving.

Can I Prepare This Casserole Ahead of Time?

Yes. You can assemble the ingredients in the casserole dish, cover it, and refrigerate it until you’re ready to cook.

If the casserole is coming directly from the refrigerator, the baking time may need to be adjusted. Always make sure the beef is thoroughly cooked before serving.

How to Store Leftovers

Allow leftovers to cool and transfer them to an airtight container.

Store in the refrigerator for up to 3–4 days.

Reheat gently in the microwave or in a covered saucepan over low heat. If the sauce has thickened considerably, add a small splash of beef broth while reheating.

Can You Freeze Beef & Mushroom Casserole?

Yes, this casserole can be frozen.

Allow it to cool completely, then place it in a freezer-safe container. Freeze for up to about 2–3 months for best quality.

Thaw overnight in the refrigerator before reheating thoroughly.

Frequently Asked Questions

Can I use another cut of beef?

Yes. Beef chuck is an excellent substitute for stew meat because it becomes tender during slow cooking.

Can I use cream of chicken soup?

You can, although cream of mushroom soup gives the casserole its classic savory mushroom flavor.

Do I have to brown the beef first?

No. This recipe is designed as an easy one-dish preparation, so the beef can go directly into the casserole dish. Browning it first can add extra flavor, but it also adds another cooking step.

Can I add fresh mushrooms?

Absolutely. Sliced mushrooms are a great addition and make the mushroom flavor even more pronounced.