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!
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
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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.