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    Home » Recipes » Main Dish

    Last Updated: Nov 30, 2023 by Angela @ BakeItWithLove.com · Leave a Comment

    Prime Rib Philly Stuffed Mushrooms

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    Jump to Recipe
    Prime rib philly stuffed mushrooms pin with text header.

    Tasty prime rib Philly stuffed mushrooms are a match made in heaven combining your amazing prime rib leftovers and portobello mushrooms! Saute some onions and heat the bite-size pieces of leftover prime rib, roast beef, or steak, then bake to perfection!

    Closeup on the melted cheese topping of the prime rib philly stuffed mushrooms.
    These flavorful prime rib Philly stuffed mushrooms are the perfect combination of earthy portobello mushrooms and rich prime rib!

    These amazingly tasty stuffed mushrooms are layers of flavors that add up to make a crowd-pleasing meal!

    Giant, stuffed portobello mushrooms are one of my family's favorite easy dinners or appetizers! The combination of one of our fave meals with tender, perfectly medium-rare leftover prime rib is not to be missed!

    The roasted mushrooms, hearty prime rib, and melted cheese pile up to make the best stuffed mushrooms ever! It's an easy-to-make meal that's also quick but delivers BIG flavor!

    Jump to:
    • 🥘 Ingredients
    • 🔪 Instructions
    • 💭 Tips & Notes
    • 🥩 More Great Prime Rib Recipes
    • 📖 Recipe Card
    • 💬 Reviews

    🥘 Ingredients

    • 4 large portobello mushrooms (cleaned, stemmed, and gills removed)
    • 1 tablespoon olive oil (extra virgin - divided into 2 portions ½ tablespoon each)
    • each, salt & pepper (to taste)
    • ½ cup yellow onion (1 small onion, sliced)
    • ½ pound prime rib roast (sliced or cut into bite-size chunks)
    • 1 cups mozzarella cheese (grated - or use provolone)

    *Be sure to see the free printable recipe card below for ingredients, exact amounts & instructions with tips!*

    🔪 Instructions

    1. Prep. Preheat your oven to 400°F (205°C), line a baking sheet with parchment paper, and lightly coat the parchment paper with nonstick cooking spray or oil.
    2. Season. Place your cleaned portobello mushrooms onto the prepared baking sheet then coat the inside with the first ½ tablespoon of olive oil and season with salt and pepper.
    3. Saute. In a large skillet or frying pan heat the second ½ tablespoon portion of olive oil to medium-high heat until just beginning to smoke. Add ½ cup sliced yellow onions and saute until starting to get tender, about 2 minutes. Add the ½ pound of sliced prime rib leftovers and toss with onions. Continue to saute until warmed and softened, about 2 additional minutes.
    4. Cook. Portion the prime rib and sauteed onions into each prepared mushroom then top with 1 cup shredded mozzarella (or provolone cheese). Bake at 400°F (205°C) for 20-25 minutes or until the mushrooms are softened and the cheese is fully melted.
    5. Serve. Once done, sprinkle with chopped parsley and serve immediately.

    💭 Tips & Notes

    • Use a towel to clean your mushrooms rather than rinsing with water.
    • Gently remove the stem and gills to avoid breaking the mushrooms.

    🥩 More Great Prime Rib Recipes


    • Prime Rib Philly Cheesesteak Stuffed Peppers
    • Prime Rib Stroganoff
    • Leftover Prime Rib Taquitos
    • Prime Rib Beef & Barley Soup
    • Breakfast Burritos (with Leftover Prime Rib)

    Do you love a recipe you tried? Please leave a 5-star 🌟rating in the recipe card below and/or a review in the comments section further down the page.
    Stay in touch with me through social media @ Pinterest, Facebook, Instagram, or Twitter! Subscribe to the newsletter today (no spam, I promise)! Don't forget to tag me when you try one of my recipes!

    📖 Recipe Card

    Closeup on the melted cheese topping of the prime rib philly stuffed mushrooms.
    Print Recipe Leave A Comment
    Love This Recipe?Click On A Star To Rate It!
    5 from 11 reviews

    Prime Rib Philly Stuffed Mushrooms

    Tasty prime rib Philly stuffed mushrooms are a match made in heaven combining your amazing prime rib leftovers and portobello mushrooms! Saute some onions and heat the bite-size pieces of leftover prime rib, roast beef, or steak, then bake to perfection!
    Author | Angela
    Servings: 4 servings
    Calories: 309kcal
    Prep 5 minutes minutes
    Cooking 25 minutes minutes
    Total Time 30 minutes minutes
    Pin Recipe Share on Facebook

    Ingredients
     

    • 4 large portobello mushrooms (cleaned, stemmed, and gills removed)
    • 1 tablespoon olive oil (extra virgin - divided into 2 portions ½ tablespoon each)
    • each, salt & pepper (to taste)
    • ½ cup yellow onion (1 small onion, sliced)
    • ½ pound prime rib roast (sliced or cut into bite-size chunks)
    • 1 cups mozzarella cheese (grated - or use provolone)
    Help Us Out!If you love a recipe, be sure to come back and share your ratings. This helps future users, and allows me to continue sharing free recipes! Angela

    Instructions

    • Preheat your oven to 400°F (205°C), line a baking sheet with parchment paper, and lightly coat the parchment paper with nonstick cooking spray or oil.
    • Place your cleaned portobello mushrooms onto the prepared baking sheet then coat the inside with the first ½ tablespoon of olive oil and season with salt and pepper.
      4 large portobello mushrooms, 1 tablespoon olive oil, each, salt & pepper
    • In a large skillet or frying pan heat the second ½ tablespoon portion of olive oil to medium-high heat until just beginning to smoke. Add the onions and saute until starting to get tender, about 2 minutes. Add the sliced prime rib leftovers and toss with onions. Continue to saute until warmed and softened, about 2 additional minutes.
      1 tablespoon olive oil, ½ pound prime rib roast, ½ cup yellow onion
    • Portion the prime rib and onions into each prepared mushroom then top with shredded mozzarella (or provolone cheese). Bake at 400°F (205°C) for 20-25 minutes or until the mushrooms are softened and the cheese is fully melted.
      1 cups mozzarella cheese
    • Once done, sprinkle with chopped parsley and serve immediately.

    Nutrition

    Calories: 309kcal (15%) | Carbohydrates: 5g (2%) | Protein: 16g (32%) | Fat: 25g (38%) | Saturated Fat: 11g (69%) | Polyunsaturated Fat: 1g | Monounsaturated Fat: 11g | Trans Fat: 1g | Cholesterol: 56mg (19%) | Sodium: 210mg (9%) | Potassium: 476mg (14%) | Fiber: 1g (4%) | Sugar: 3g (3%) | Vitamin A: 189IU (4%) | Vitamin C: 1mg (1%) | Calcium: 152mg (15%) | Iron: 1mg (6%)
    Did you try this recipe? Rate it below!I can’t wait to see your results! Mention @bake_it_with_love or tag #bake_it_with_love!
    leftover prime rib roast, portobello mushrooms, prime rib, Prime Rib Philly Stuffed Mushrooms
    Course Appetizers, Beef Dishes, Leftover Ideas, Main Dish
    Cuisine American
    author profile photo
    Angela @ BakeItWithLove.com

    Angela is an at home chef that developed a passion for all things cooking and baking at a young age in her Grandma's kitchen. After many years in the food service industry, she now enjoys sharing all of her family favorite recipes and creating tasty dinner and amazing dessert recipes here at Bake It With Love!

    bakeitwithlove.com/about/

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    Hi there, I'm Angela! I am an avid vintage cookbook collector, cook, baker, and total foodie. I love sharing new, fun, creative recipes and great classic recipes just like my Grandma used to make! Every recipe on BIWL is tested to ensure that cooks of any experience level can succeed.

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