Prime Rib Soup is the simple, but oh-so-delicious side effect of one of the best known things on the planet - a prime rib. A super flavorful broth, tender mushrooms, and wonderful pieces of beef come together quickly and easily for a soup that you'll crave all year long!
Grab a piece of crusty bread for dipping and let's get started!
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And, if you're in the mood for more wonderful recipes just like this, I've got plenty to choose from! Try my Manhattan Clam Chowder or my Chicken Pot Pie Soup! Both so good and comforting, both so very easy to make!
Pull Up A Chair and Let's Chat!
Prime Rib is my favorite. It really is. It's tender and lovely and I will make it anytime we have a special get-togethers. Not only is one of the best things on the planet, but you can turn the leftovers into an amazing soup. Prime Rib Soup is just incredible. Full of tender beef, mushrooms, and a broth that is so flavorful, you'll be sitting in wait until the next time prime rib pops up on the menu.
The soup is not only delicious, but it's easy and you can customize it so many ways. You can add in veggies or pasta. You can even switch up the proteins if you are in the mood for the broth portion, but don't have leftover prime rib laying around.
Make it during the holidays with leftovers, serve it to friends on special occasions, or just enough it on nights when everyone is in the mood for comfy and cozy bowls of deliciousness. Just don't forget some bread for dipping!
What You'll Need
- Leftover Prime Rib - This recipe is the only reason to have leftover prime rib in my opinion.
- Butter, Yellow Onion, Garlic, Cremini Mushrooms - Is there any better flavor combination than that? I think not.
- Beef Broth and Beef Broth Base - For all the beefy flavor.
- Dried Thyme, Dijon Mustard, Worcestershire Sauce - The flavor players.
- Kosher Salt and Fresh Ground Pepper - Seasoning basics. Always and forever.
- Sour Cream - The creamy, tangy component. Serve with a healthy dollop on top, too!
- Fresh Parsley or Chives, for garnish
A Word About Beef Broth
Everyone will use a different beef broth for their Prime Rib Soup. The store varieties will all have different sodium levels. My homemade beef broth will have different sodium levels from those. They are all unique in flavor.
Taste your soup as you go along. Add salt and pepper as needed and per your taste. You can also add beef broth base to help with flavor and salt levels.
Also, buy a good quality beef broth. This is a simple soup and you want the flavors to be as good as they can be. We don't need much in the way of ingredients, so make sure you getting your hands on the best quality you can.
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How To Make It
Prime Rib Soup is so close I can almost taste it! And, because it's super easy and quick, it'll be on the table in no time! I'll give you the quick rundown here, but the specifics will live in the recipe card below.
Simply:
- Sauté and add the aromatics.
- Add broth and flavorings.
- Add sliced mushrooms and cook.
- Make sour cream mixture and add to soup.
- Stir in the prime rib.
Garnish with a dollop of sour cream, fresh herbs, and fresh cracked pepper. We always have to serve with a side of crusty bread for dunking. Enjoy!
Variations and Substitutions
- Throw in any veggies you have or love. This is a wonderfully beefy soup and would be fantastic with many different veggie options.
- Pasta would be fantastic with this soup. Add a small-sized pasta along with the mushrooms. Once cooked to al dente, add the diced prime rib.
- Potatoes would also be a great add-in. Add them along with the mushrooms, cooking until tender and proceed with the recipe as written.
- A healthy sprinkle of freshly grated parmesan would be really good here, too!
Tips and Tricks
- Cut the onions, mushrooms, and prime rib into small, similar-sized pieces that can be easily enjoyed on a spoon.
- If you prefer a thicker soup, you can add in a cornstarch slurry along with the prime rib pieces.
- If you don't like sour cream or don't have any, a splash of heavy cream would be a lovely addition. Or, your can keep it simple and brothy.
Frequently Asked Questions
Is this Prime Rib Soup recipe gluten-free?
It is! No worries about that dietary restriction here.
Do I have to use prime rib?
No! The soup base is incredibly versatile. You can use whatever leftover protein you have on hand. Tender pieces of beef pot roast or leftover grilled ribeye would be fantastic. Even cooked ground beef would work. Toss in leftover rotisserie chicken from the week, or leave out the protein for a phenomenal mushroom soup!
Storage and Reheating Instructions
Store leftovers in the fridge in an airtight container for up to 3 days.
Reheat slowly on the stove top or in the microwave covered with a damp paper towel. The trick to reheating creamy soups is to take your time.
Freeze this soup recipe in air-tight containers for up to 3 months. When you're ready, allow the soup to thaw in the fridge. To reheat, do so slowly on the stovetop.
Prime Rib Soup Recipe
Equipment
Ingredients
- 1½ lbs leftover prime rib, cute into small bite-sized pieces
- 2 tablespoon butter
- 1 med onion, diced
- 5-6 cloves garlic, minced
- 1 teaspoon dried thyme leaves
- 16 oz cremini mushrooms, thinly sliced
- 8 cups beef broth
- 1 tablespoon beef broth base
- 1 tablespoon Worcestershire sauce
- 1 tablespoon dijon mustard
- 1 cup sour cream
- kosher salt and fresh ground pepper, to taste
- fresh parsley and chives, for garnish
Instructions
- In a large dutch oven on medium heat, sauté diced onions in the butter until they become translucent. Add the garlic and dried thyme leaves, cooking just until they become fragrant.
- Add the beef broth to the dutch oven along with the beef broth base, Worcestershire sauce, and dijon mustard. Bring the broth mixture to a simmer. Taste for salt at this point, adding some along with fresh ground pepper if desired.
- Add the sliced mushrooms to the simmering broth and cook until the mushrooms are softened.
- In a separate mixing bowl, whisk the sour cream along with some of the beef broth. This will help loosen the sour cream so that it mixes easier into the soup.
- Pour the sour cream mixture into the soup, stirring until it's combined. Again, taste the broth. Make sure your salt level is good. If you need more, add more.
- Add in the prime rib pieces, cooking until they're just warmed through.
- Garnish with a dollop of sour cream, fresh herbs, and fresh cracked pepper. We always have to serve with a side of crusty bread for dunking. Enjoy!
Nutrition
If you guys make this Prime Rib Soup, be sure to leave a comment and/or give this recipe a rating! I absolutely love to hear from you all and always do my best to respond to each and every one of your comments!
Thank you!
I am so incredibly happy that you are here! I hope you try my Prime Rib Soup recipe and fall in love with it. If you make this recipe, please share and tag me on Instagram, Facebook, or TikTok! And, please leave a comment or star rating below. I absolutely love seeing each and every one of your kitchen masterpieces. It makes my heart so happy! And, as always, if you ever have any questions about any of my recipes, please don't hesitate to contact me!
Happy Cooking!
-Rufus
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Other Fantastic Soup Recipes
Tomato Basil Soup - A classic. Especially paired with a toasty grilled cheese sandwhich!
White Lasagna Soup - It's rich and creamy and comes together in about 20 minutes!
Loaded Baked Potato Soup - A family favorite. It's hearty, cheesy, and just wonderful!
Vegetable Beef Soup - It's rich and hearty, but not heavy. Full of wonderful flavor, the entire family will love this!
Old-Fashioned Beef Stew - Another classic. Hearty, full of tender beef and vegetables. I love this one anytime of year!
DeniseSC says
Made last night, wonderful!! I thought there would be too many mushrooms, not! They give it the creaminess. I thought that would be too much garlic. Nope, garlic didn’t stand out at all. Took longer to prepare, it usually does the first time I make something. But there is a lot of time on washing and slice/chop ingredients. If you did that prep stuff earlier and are just assembling that 10 minutes would be accurate. I used 2 tablespoons of unsalted butter; the directions said to sauté onions in it. But it wasn’t listed as an ingredient on the recipe. When I make it again I will try it with only 1TBSP. Portions were right on. Crusty bread would be better than crackers. Didn’t have salad ingredients, so I roasted broccoli. The sour cream dollop was great and I used chopped basil that I had for the herb. Would be 5* except for missing ingredient on list and amount of prep time. Thanks Rufus!!!
Rufus says
I'm so glad you liked it!
Amelia says
This is so good! We didn’t have prime rib, but used leftover steak and it was great!