Can I Eat Expired Peanut Butter Opened?
Safe to eat up to 30 days after expiry
Expert Source
"Once opened, a jar of commercial peanut butter can be stored in a cool, dry place for up to three months." - FDA
✅Fresh Peanut Butter Opened

⚠️Spoiled Peanut Butter Opened

Storage Guidelines
Storage Location
Pantry
Ideal Temperature
60-70°F (15-21°C)
Best Storage Method
Store in a cool, dry place away from direct sunlight
Shelf Life
Average Shelf Life
90 days
Signs of Spoilage
Unpleasant odor, mold growth, change in texture or color
Additional Information
Alternative Uses
In baking, as a spread for fruits, in smoothies
Possible Substitutions
Almond butter, sunflower seed butter
Frequently Asked Questions
What's the difference between expiration and best quality dates for Peanut Butter Opened?
Over time, peanut butter can undergo oil separation and become rancid, affecting its taste and texture. While peanut butter technically does not expire and can be safe to consume past the 'best by' date if stored properly, its quality may degrade. It is essential to check for any signs of mold or off odors before consuming, as rancid peanut butter can pose health risks.
How can I tell if Peanut Butter Opened has gone bad?
To check if opened peanut butter has gone bad, look for any signs of mold on the surface, a rancid or sour smell, or a change in texture like separation of oil or a gritty texture. If you notice any of these indicators, it's best to discard the peanut butter to avoid consuming spoiled food.
What are the food safety risks with Peanut Butter Opened?
Peanut butter can be susceptible to aflatoxins, a type of mold that can be harmful if consumed in large quantities. To prevent contamination, always use clean utensils to scoop out the butter, avoid double-dipping, and store it in a cool, dry place away from direct sunlight. High-risk scenarios include leaving the jar open for long periods or storing it in warm, humid conditions.
What are some pro tips for storing Peanut Butter Opened?
To maintain peanut butter's freshness and prevent oil separation, store the jar upside down to create a natural seal with the lid. Stir the butter well upon opening to distribute any settled oils. For long-term storage, refrigeration can extend its shelf life, but bring it to room temperature before consuming for better spreadability.
Any interesting facts about Peanut Butter Opened?
Peanut butter has a rich history dating back to the Aztecs and Incas who ground roasted peanuts into a paste. In the United States, peanut butter became popular during the early 20th century and gained cultural significance as a staple in many households. Interestingly, peanut butter is not as commonly consumed in European countries compared to the Americas.
Expiration Calculator
Sources
For more information on food safety and expiration guidelines, visit our Sources page.
Recipes Available
We have recipes that can help you safely use peanut butter opened past its expiration date!
View Recipes →Related Foods
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Reviewed By: Food Safety & Expiration Experts
At Can I Eat Expired, we are committed to providing accurate, science-backed information about food expiration and storage safety. Our content is carefully reviewed based on guidelines from leading food safety organizations, including:
- ✅U.S. Food & Drug Administration (FDA) – Food Safety Guidelines
- ✅United States Department of Agriculture (USDA) – Food Storage & Expiration Dates
- ✅World Health Organization (WHO) – Foodborne Diseases & Safety
- ✅Centers for Disease Control & Prevention (CDC) – Preventing Foodborne Illness
🔍 How We Ensure Accuracy
- We use official food safety sources to guide our recommendations.
- Our team continuously reviews and updates content based on the latest research.
- We encourage users to always check for signs of spoilage and follow proper storage guidelines.
📚 Have Questions?
If you have specific concerns about food expiration or safety, we recommend consulting a registered dietitian, food scientist, or your local health department.
Note: These are general guidelines. Always use your best judgment and when in doubt, throw it out.