How to Transform Leftover Mashed Potatoes into a Creamy Potato Soup

This article discusses How To Make Potato Soup With Leftover Mashed Potatoes, hopefully providing additional knowledge for you.

The Magic of Leftovers: Transforming Mashed Potatoes into a Soup

Have you ever found yourself with an abundance of leftover mashed potatoes and wondered what to do with them? Instead of tossing them out or forcing yourself to eat them plain, why not turn them into a delectable potato soup? In this comprehensive guide, we will unveil the secrets to crafting a creamy and flavorful potato soup using your leftover mashed potatoes.

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Mashed potatoes are the perfect base for a potato soup because they already have a smooth and creamy texture. By adding a few simple ingredients and following a few easy steps, you can transform those leftovers into a hearty and heartwarming soup that is both comforting and delicious.

Embark on a Culinary Adventure: A Detailed Guide to Making Potato Soup


  • 3 cups leftover mashed potatoes
  • 4 cups vegetable broth
  • 1 onion, diced
  • 2 celery stalks, diced
  • 2 carrots, diced
  • 3 cloves garlic, minced
  • 1/2 teaspoon dried thyme
  • Salt and pepper to taste
  • Optional: 1 cup shredded cheddar cheese


  1. Sauté the Aromatics: Heat a large pot or Dutch oven over medium heat. Add a drizzle of olive oil and sauté the onion, celery, and carrots until softened, about 5-7 minutes.

  2. Add the Garlic and Thyme: Stir in the minced garlic and dried thyme. Cook for an additional minute to release the aromatics.

  3. Incorporate the Broth and Mashed Potatoes: Gradually pour in the vegetable broth, stirring to combine. Bring the mixture to a boil, then reduce the heat to low. Add the leftover mashed potatoes and whisk until smooth.

  4. Season to Taste: Season the soup with salt and pepper to taste. You can also add other seasonings of your choice, such as bay leaves or rosemary.

  5. Simmer and Thicken: Allow the soup to simmer for 15-20 minutes, or until it has thickened to your desired consistency. If desired, you can use an immersion blender to puree the soup for a smoother texture.

  6. Add Cheese (Optional): For an extra layer of flavor and creaminess, stir in shredded cheddar cheese. Allow the cheese to melt and incorporate into the soup.

Tips for a Perfect Potato Soup

  • Choose the Right Potatoes: Russet potatoes are the best choice for mashed potatoes, as they have a high starch content that results in a smooth and creamy texture.

  • Don’t Overwork the Potatoes: When mashing the potatoes, do not overwork them, as this can make them gluey. Use a potato masher or a fork to gently mash the potatoes until they are just combined.

  • Use a Rich Broth: The broth you use will greatly impact the flavor of the soup. Use a high-quality vegetable broth or make your own using fresh vegetables.

  • Don’t Skimp on the Aromatics: The sautéed onion, celery, and carrots add depth of flavor to the soup. Generously season the soup with salt and pepper to enhance the flavors.

  • Experiment with Herbs and Spices: In addition to thyme, you can add other herbs and spices to customize the flavor of your potato soup. Try adding rosemary, sage, or paprika.

Frequently Asked Questions (FAQs)

Q: Can I use instant mashed potatoes?

A: Yes, you can use instant mashed potatoes to make this soup. However, the texture will not be as smooth as when using fresh mashed potatoes.

Q: How long will potato soup keep in the refrigerator?

A: Potato soup will keep in the refrigerator for up to 3 days. Allow the soup to cool completely before storing it in an airtight container.

Q: Can I freeze potato soup?

A: Yes, potato soup can be frozen for up to 2 months. Place the soup in an airtight freezer-safe container. When ready to serve, thaw the soup in the refrigerator overnight or reheat it slowly over low heat.


Transforming leftover mashed potatoes into a creamy and flavorful potato soup is an easy and delicious way to repurpose your leftovers. By following the detailed instructions in this guide and incorporating our tips, you can create a comforting and satisfying meal that the whole family will enjoy. So, the next time you find yourself with leftover mashed potatoes, embrace the magic and whip up a heartwarming potato soup that will warm your soul.

Are you a potato soup enthusiast? Let us know your favorite variations or tips in the comments below!

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