Leftover Mashed Potato Soup - The Quicker Kitchen (2024)

Leftover mashed potato soup reinvents your holiday side dish into a delicious next day meal. This creamy potato soup is thick, velvety and tastes like a completely new dish!

In my house every last morsel will get eaten even if it means I have to get creative with my leftovers to make sure it happens.

Have you seen the price of groceries lately?

We can’t let anything go to waste!

And we almost always have leftover mashed potatoes after Thanksgiving and Christmas.

Yes, the first day after my husband and sons will eat a second Thanksgiving type meal, but the next day?

Forget it.

That’s when I have to get creative, and turning leftover mashed potatoes into a creamy soup fits the bill!

It keeps them happy and tastes like a totally new meal.

Ingredients

To make this you’ll need:

• Roux ingredients– Butter and flour to thicken the soup
• Broth– Chicken or vegetable broth
• Milk– Whole milk will give you the creamiest results
• Leftover mashed potatoes
• Cheese– Shredded cheddar
• Salt and pepper– To taste
• Toppings– Bacon bits, more cheese, sliced green onions, etc.

How to Make

Making leftover mashed potato soup is so easy!

Start by melting the butter in a large pot set over medium heat.

Then whisk in the flour until it forms a paste-y consistency and let it cook an additional 30-60 seconds to cook off any floury taste.

Whisk in the chicken broth 1 cup at a time.

Once all of the broth has been completely incorporated, stir in the milk.

Then stir in the mashed potatoes and the cheese.

Bring the soup to a simmer, and then cook for 3-5 more minutes until the soup’s thickened to your preferred consistency.

Season it with salt and pepper, to taste.

Serve warm garnished with shredded cheese, crisp bacon bits, and/or sliced green onions.

Enjoy!

Storing Leftovers

You can store leftovers in an airtight container in the fridge for up to 3 days.

Reheat in a pot on the stove over medium low heat until it’s warmed through.

You may have to add more broth or milk while you are reheating the soup since it will thicken considerably as it sits.

Can you freeze potato soup?

Yes, you can however, I don’t like to freeze potato soup since it includes dairy.

The soup tends to separate and doesn’t always come back together well.

If you do want to freeze it, cook the soup as directed and then let it cool to room temperature.

Transfer the soup into sealable freezer bags or containers.

Freeze for up to 3 months and reheat in the microwave when ready to serve.

Best Toppings for Potato Soup

Part of the fun of potato soup is loading it up with any toppings you’d put on a baked potatoes.

Favorite toppings for potato soup include:

• sour cream
• sliced green onions
• shredded cheese
• bacon bits
• fresh chopped cilantro or parsley

Tips and Tricks

• Don’t have leftover mashed potatoes? You can prepare instant mashed potatoes to the package directions and use them in the recipe as instructed. Be sure to make enough to yield four cups of mashed potatoes.
• Want to make this a vegetarian soup? Skip the bacon garnish, and use vegetable broth in place of chicken broth.
• Be careful not to let the flour butter paste cook longer than the additional 30-60 seconds called for. Stir it constantly during this time to prevent browning and/or burning.
• Adjust the seasonings to your preference. We’ve added garlic powder, onion powder, seasoned salt, etc. It’s hard to mess up potato soup!

Other Ways to Use Up Holiday Leftovers

Leftover mashed potato soup turns your holiday side dish into a delicious new meal.

Make it and enjoy!

Looking for other ways to use up holiday leftovers?

Try these:

• Leftover Turkey Salad
• Cornbread Dressing Fritters
• Thanksgiving Leftover Sliders

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