How Long Are Mashed Potatoes Good For? Tip And Tricks

Mashed potatoes are a classic side dish that can be enjoyed in so many ways. Whether you like them with gravy, butter, or sour cream, mashed potatoes are a delicious addition to any meal. But if you make too much or have leftovers, you may be wondering how long they are good for. In this post, we’ll explore the shelf life of mashed potatoes and give you some tips for storing and reheating them.

How Long Are Mashed Potatoes Good For?

Mashed potatoes (MP) are a cooked food, and like most cooked foods, they have a limited shelf life. If you leave MP at room temperature for more than two hours, you run the risk of bacteria growth. Bacteria can cause foodborne illness, so it’s essential to know how long MP are good for.

When stored in the refrigerator, MP can last up to four days. This timeframe applies to homemade MP and store-bought ones that have been opened. If you’re not planning to eat your MP within four days, it’s best to freeze them.

Frozen MP can last up to six months in the freezer. However, it’s worth noting that freezing can affect the texture of MP. When thawed and reheated, MP can become watery or grainy. That’s why it’s essential to take steps to preserve the quality of your MP.


Tips for Storing Mashed Potatoes

To make your MP last as long as possible, it’s crucial to store them properly. Here are some tips for storing MP:

  1. Refrigerate promptly: As soon as you’ve finished serving your MP, transfer them to an airtight container and refrigerate them immediately. The longer MP sit at room temperature, the more chance bacteria has to grow.
  2. Don’t leave out for too long: If you’re serving MP at a party or gathering, don’t leave them out for longer than two hours. After that, they should be refrigerated or discarded.
  3. Cover and seal: To keep air out and maintain freshness, cover your mashed potatoes with plastic wrap or an airtight lid. Make sure the container is sealed tightly to prevent bacteria from getting in.
  4. Use the right container: Use a shallow, wide container to store your mashed potatoes. This allows them to cool faster and ensures they’re evenly distributed in the container.

Tips for Reheating Mashed Potatoes

Reheating mashed potatoes can be a bit tricky, especially if you want to preserve their texture and flavor. Here are some tips for reheating mashed potatoes:

  1. Add liquid: If your mashed potatoes are dry, add a little milk, cream, or butter to moisten them up. This will also help prevent the mashed potatoes from becoming grainy when reheated.
  2. Microwave: Microwave your mashed potatoes in short bursts, stirring every 30 seconds. This ensures even heating and prevents hot spots from forming.
  3. Use a double boiler: Reheat your mashed potatoes in a double boiler to prevent scorching or sticking. A double boiler is a pot with an upper bowl or basket that sits on top of the pot, allowing the food to be heated by steam.
  4. Avoid overcooking: Don’t overcook your mashed potatoes when reheating them, as this can make them watery or mushy. Heat them just enough to warm them through.

Making the Most of Your Leftover Mashed Potatoes

While MP are delicious on their own, they can also be transformed into a variety of dishes with a little creativity. Here are some recipes and tips for making the most of your leftover MP:

Shepherd’s Pie

Shepherd’s pie is a classic dish made with ground meat, vegetables, and MP. To make this dish, sauté ground beef or lamb with onions, carrots, and celery until the meat is browned.

Add tomato paste, beef broth, Worcestershire sauce, and seasonings to taste. Pour the mixture into a baking dish and top with a layer of MP. Bake at 375°F for 30-35 minutes or until the MP are golden brown.


Potato Cakes

Potato cakes are a great way to use up leftover MP. Mix your MP with an egg, flour, and seasonings to form a dough. Shape the dough into patties and fry them in a pan until golden brown on both sides. Serve your potato cakes with sour cream, applesauce, or your favorite dipping sauce.


Potato Soup

Potato soup is a comforting and hearty dish that’s perfect for using up leftover MP. In a pot, sauté onions and garlic in butter until softened. Add diced potatoes, chicken or vegetable broth, and seasonings to taste.

Bring the mixture to a boil and simmer until the potatoes are tender. Stir in leftover MP and blend the soup until smooth. Serve with crusty bread and enjoy!


Add to Muffin Batter

You can add leftover mashed potatoes to muffin or pancake batter for a unique twist. The MP add moisture and richness to the batter, creating a deliciously fluffy texture. Try adding them to pumpkin muffins or cornbread for a savory twist.


Potato Gnocchi

Gnocchi are small Italian dumplings made with potatoes and flour. To make potato gnocchi, mix leftover MP with flour, egg, and seasonings to form a dough. Roll the dough into small balls and shape them into dumplings. Boil the gnocchi in salted water until they float to the surface, then serve with your favorite sauce.


In addition to these recipes, there are a few other tips for making the most of your leftover MP. You can use them as a topping for shepherd’s pie or casseroles, mix them with other leftover vegetables to make a hash, or use them as a filling for pierogies or empanadas.

When storing leftover MP for later use, it’s best to freeze them in an airtight container or freezer bag. This will help preserve their texture and prevent freezer burn. When you’re ready to use them, simply thaw them in the refrigerator overnight and use them in your favorite recipe.


How long are mashed potatoes (MP) good for in the fridge?

MP are good for up to four days in the refrigerator. Be sure to store them in a shallow container with a tight-fitting lid and refrigerate them promptly after serving.

Can I freeze leftover MP?

Yes, you can freeze leftover MP for up to six months. Freeze them in an airtight container or freezer bag, and thaw them in the refrigerator overnight before reheating.

How do I reheat leftover mashed potatoes?

To reheat MP, you can use the microwave or a double boiler. If the MP are too thick, you can add a little milk or cream to loosen them up. Heat them in short bursts in the microwave or over low heat in a double boiler, stirring occasionally, until they are heated through.

Can I use leftover MP in recipes?

Yes, leftover MP are great for using in recipes like shepherd’s pie, potato soup, potato cakes, and potato gnocchi. They can also be used as a topping for casseroles or mixed with other leftover vegetables to make a hash.

How can I tell if leftover MP are still good to eat?

You can tell if leftover MP are still good to eat by using your senses. If they have a sour or off odor, or if they have mold on them, they should be discarded. If they look and smell okay, you can give them a taste to make sure they haven’t gone bad.


To avoid foodborne illness and maintain quality, store and reheat mashed potatoes properly. Refrigerate them promptly in a shallow container with a tight seal. Reheat using short bursts in the microwave or a double boiler and add liquid if needed.

Enjoy them for up to four days in the fridge or six months in the freezer. Use your judgment before eating leftover mashed potatoes and discard if they appear or smell off. Get creative with using them in recipes such as shepherd’s pie, potato cakes, or potato soup. Mix in other ingredients for added flavor.