How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Leftover Roast Beef Soup (Leftover Steak Too!)?

You need 11 ingredients. The key ingredients include: 2 medium yellow onions, cut into small wedges, 2 stalks celery, chopped, 2 cups sliced fresh mushrooms, 2 tablespoons butter or 2 tablespoons olive oil, and more.

Is Leftover Roast Beef Soup (Leftover Steak Too!) suitable as soups & stews?

Yes, Leftover Roast Beef Soup (Leftover Steak Too!) falls under the Soups & Stews category and is a great choice for this type of meal.

How do I store leftover Leftover Roast Beef Soup (Leftover Steak Too!)?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Leftover Roast Beef Soup (Leftover Steak Too!)

Name: Leftover Roast Beef Soup (Leftover Steak Too!)
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 medium yellow onions, cut into small wedges; 2 stalks celery, chopped; 2 cups sliced fresh mushrooms; 2 tablespoons butter or 2 tablespoons olive oil; 3 -4 cloves garlic, minced; 1 1/2 lbs leftover cooked beef, chopped (or may use thinly sliced leftover steak); 64 ounces beef stock or 64 ounces beef broth; 1 tablespoon Worcestershire sauce; salt, to taste; black pepper, to taste; 8 ounces uncooked egg noodles

Warm up with this hearty Leftover Roast Beef Soup (Leftover Steak Too!) recipe. Made with yellow onions, stalks celery, mushrooms and butter. Easy step-…

This Leftover Roast Beef Soup (Leftover Steak Too!) relies on simple, everyday ingredients such as stalks celery, chopped, sliced fresh mushrooms, garlic, minced and worcestershire sauce. It comes together quickly and makes 4 servings, at about 894 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It works as a light main on its own or as a starter alongside crusty bread, and it's just as good for a cozy night in as it is for feeding a crowd. Leftovers keep well, so it's a smart choice for meal prep too.

Updated Jun 30, 2026

Serves 4 Soups & Stews

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Leftover Roast Beef Soup (Leftover Steak Too!)

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions