Mayonnaise, that creamy and tangy condiment, is a staple in many refrigerators around the world. Used in everything from sandwiches to dressings to dips, it’s important to know how to store it properly and when it’s time to say goodbye.

While it may seem like a simple condiment, the longevity of mayonnaise in the fridge can be affected by various factors, including how it was made, the presence of preservatives, and how it’s been handled after opening. Understanding these factors can ensure that you enjoy your mayo at its best and avoid any potential food safety issues.

Before we delve into the specifics of how long mayonnaise lasts, it’s important to distinguish between store-bought and homemade varieties:

1. Store-Bought Mayo: Typically, a jar of unopened store-bought mayonnaise can last well beyond its 'best by' date if kept in the refrigerator. Once opened, it is usually safe to consume for up to two months as long as it has been stored at or below 40°F (4°C).

2. Homemade Mayo: Because homemade mayonnaise lacks the preservatives found in commercial products, it has a significantly shorter shelf life. Homemade mayo should only be kept in the fridge for up to one week.

Keep in mind that these are general guidelines, and actual shelf life may vary depending on the specific conditions in which the mayonnaise is kept.

Even within the refrigerator's cool environment, mayonnaise can spoil. Here are several indicators that your mayonnaise may have gone bad:

1. Off Smell: A pungent or sour smell is a clear indication that your mayonnaise is no longer safe to consume. This might be the first sign you notice when you open the jar or bottle.

2. Change in Color: If the mayonnaise has taken on a yellowish hue or any discoloration has occurred, it’s a signal that it may be spoiled.

3. Altered Texture: Healthy mayonnaise should have a creamy, uniform consistency. If it appears separated, with oil on top and a lumpy texture, it’s likely gone bad.

4. Mold Presence: Any signs of mold or spores, which can be white, green, or black, mean the mayo should be discarded immediately. Never taste mayonnaise if you see mold—just toss it out.

5. Taste: If the mayonnaise has passed the visual and smell tests but tastes distinctly different from when it was fresh, it may be best to err on the side of caution and dispose of it.

Remember, consuming spoiled mayonnaise can put you at risk for foodborne illnesses, some of which can be quite serious.

To maximize the life of your mayonnaise while ensuring it remains safe to eat, consider the following tips:

1. Always use clean utensils when scooping mayonnaise from the jar to prevent contamination.

2. Keep the lid tightly closed when not in use to limit exposure to air and potential contaminants.

3. Store mayonnaise on the shelves of the refrigerator, where the temperature is often more stable, rather than in the door.

4. Check the expiration date on store-bought mayonnaise prior to purchase to ensure you're getting the freshest product.

5. Pay close attention to any storage instructions on the label, as some varieties may have specific requirements.

By following the guidelines outlined above, you can help extend the shelf life of your mayonnaise and prevent any unnecessary waste. Most importantly, you can enjoy the flavors of your favorite mayonnaise-based dishes with peace of mind, knowing it's safe to consume. When in doubt, it is always better to play it safe and throw out any mayonnaise that you suspect has gone bad. Trust your senses and when something seems off, it probably is!

Copyright 2016 Cooktop Cove