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white bowl filled with mashed potato soup.
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Mashed Potato Soup

Mashed Potato Soup is a great way to use up leftover mashed potatoes. This quick cooking soup comes together in 30 minutes with just 6 ingredients. Even better, your family will never know they are eating the leftover mashed potatoes!
Course Soup
Cuisine American
Diet Low Salt
Prep Time 5 minutes
Cook Time 25 minutes
Total Time 30 minutes
Servings 4
Calories 278kcal
Author Katie

Equipment

  • Stove Top

Ingredients

  • 2 tablespoons Salted Butter
  • ½ small Onion diced
  • 1 tablespoon All-purpose flour
  • 2-½ cups 2% milk
  • 3 cups Leftover mashed potatoes
  • salt and pepper to taste
  • 1 teaspoon Dried parsley
  • ½ cup Shredded Cheddar Cheese
  • 4 slices Cooked Bacon diced

Instructions

  • In a large stock pot melt butter on medium heat.
    2 tablespoons Salted Butter
  • Then add in onion. Caramelize until golden brown mixing periodically, for 10 minutes.
    ½ small Onion
  • Once the onions are golden in color add the all-purpose flour and mix well until the onions have been coated with the flour mixture.
    1 tablespoon All-purpose flour
  • Pour the milk into the pot and stir for one minute.
    2-½ cups 2% milk
  • Then add in the mashed potatoes. Mixing until all the potatoes have broken up. Cook on medium-low heat for 10-15 minutes or until potatoes are smooth. Taste the soup and add salt and black pepper if desired.
    3 cups Leftover mashed potatoes, salt and pepper to taste
  • Ladle into bowls and top with dried parsley, shredded cheddar cheese, crumbled bacon, and cracked black pepper. Enjoy!
    1 teaspoon Dried parsley, ½ cup Shredded Cheddar Cheese, 4 slices Cooked Bacon

Notes

  • Toppings: You can top with green onions, chives, shredded cheddar, cracked black pepper, and my favorite bacon!
  • Substitutions:
    • Dairy Free - Omit the butter and milk and use a plant based alternative. Just know it will alter the taste of the soup.
    • Gluten Free - Use a gluten free flour for the roux.
    • Vegan - Omit the dairy for plant based alternatives and use a vegetable stock instead!
    • Potatoes - You could make this a sweet potato soup if you have mashed sweet potatoes instead.
    • Broth - If you don't have milk you could use vegetable or chicken broth.

Nutrition

Serving: 0.75c | Calories: 278kcal | Carbohydrates: 45g | Protein: 12g | Fat: 6g | Saturated Fat: 3g | Cholesterol: 20mg | Sodium: 254mg | Potassium: 741mg | Fiber: 3g | Sugar: 9g | Vitamin A: 150IU | Vitamin C: 37mg | Calcium: 189mg | Iron: 1mg