Is It Actually Safe to Leave Butter on the Counter? An Expert Weighs In
— Alex Gayton and Dr. Gülsün Akdemir Evrendilek
Are you team “store butter on the counter” or “in the fridge”? This feels like a classic debate topic in many households. Growing up, my parents stored a stick of butter in a butter dish on the counter so it would stay soft. Now, I never store butter on the counter because I think that when I buy butter in the store, it’s always in the refrigerated section, so why would I store it at home differently?
I didn’t know enough about this topic, so to be sure I got the facts, I asked my colleague Dr. Gulsun Akdemir Evrendilek, UMaine Associate Extension Professor and Seafood Technology and Food Safety Specialist, to share what she knows. Here’s what Gulsun recommends:
Gulsun: Butter is not a single, uniform product. Differences in salt content, moisture level, fat concentration, and processing affect how quickly butter spoils, how easily it oxidizes, and how safely it can be stored at room temperature.
What is oxidation? Oxidation is a chemical reaction that happens when a substance comes into contact with oxygen. In the context of butter, fat oxidation is a chemical reaction when fat reacts with oxygen, which causes the fat molecules to go rancid, causing off smell, taste, and discoloration.
Salted Butter
Gulsun: Salted butter contains added salt, which helps slow microbial growth and oxidative spoilage. Combined with butter’s naturally high fat content and low moisture, this makes salted butter the most tolerant of short-term counter storage. For everyday household conditions, salted butter may be kept at room temperature below 70°F (approximately 21°C) for up to one to two days if stored in a covered dish or butter crock and protected from heat, light, and air. For longer storage and best flavor, refrigeration is recommended.
Also, remember that in the warmer months, the temperature in your house may be warmer, which can cause butter to go rancid more quickly.
Unsalted Butter
Gulsun: Unsalted butter lacks salt’s preservative effect, making it more susceptible to flavor changes and spoilage. Although it is also high in fat, unsalted butter should be stored in the refrigerator and removed only briefly to soften before use. Extended counter storage is not recommended.
Cultured Butter
Gulsun: Cultured butter is made from cream that is fermented before churning, giving it a tangy flavor and complex aroma. While fermentation can slightly lower pH, cultured butter still contains moisture and milk solids, so it should be stored in the refrigerator. It may be softened briefly at room temperature, but it is not intended for counter storage.
European-style Butter
Gulsun: European-style butter contains a higher butterfat percentage and slightly less water than standard U.S. butter, which contributes to its rich texture. Storage guidance depends on whether it is salted or unsalted: salted versions may tolerate short counter storage, while unsalted versions should be stored in the refrigerator.
Whipped Butter
Gulsun: Whipped butter has air incorporated during processing, increasing its surface area. This makes it more prone to oxidation and off-flavors, so whipped butter should always be stored in the refrigerator and kept tightly covered.
Compound butter
Gulsun: Compound butter (butter mixed with herbs, garlic, spices, or other ingredients) should be stored in the refrigerator at all times. Added ingredients can introduce moisture and microorganisms, increasing food safety risk and reducing shelf life.
Clarified Butter and Ghee
Gulsun: Clarified butter and ghee are produced by removing water and milk solids, leaving nearly pure butterfat. Because they contain virtually no moisture or milk proteins, they do not readily support bacterial growth and are considered shelf-stable when stored in a sealed container. Ghee can safely be kept at room temperature, although refrigeration can help preserve flavor over long storage periods.
Main Takeaway
The safest way to store butter depends on salt, moisture, and processing. In general, the lower the moisture and the higher the fat and salt content, the more stable the butter. Refrigeration is always the best choice for long-term storage, but understanding these differences helps explain why some butters can briefly stay on the counter while others should not.
Resources
- Markers and Mechanisms of Deterioration (Food Engineering Reviews)
- FoodKeeper App (U.S. Dept. of Health & Human Services)
- How To Store Butter (Go Bold With Butter)
- How Long Can Butter Sit Out? (Keep Food Safe)
- How Long Can I Leave This Out? (Michigan State University Extension)
- Salted Butter (UL Prospector)
- Butter remains fresh and soft for weeks if you stop putting in fridge and use surprising method (Nottingham Post)
Author
Dr. Akdemir Evrendilek is an Associate Extension Professor and Seafood Technology & Food Safety Specialist with expertise in food safety, food microbiology, and foodborne pathogens. She provides training in seafood HACCP, meat and poultry HACCP, and food processing sanitation, helping industry professionals and students strengthen compliance and safety practices. Her research focuses on innovative food processing technologies such as pulsed electric fields (PEF), high-pressure processing (HPP), ozone, UV-C, and ultrasonication, as well as biosensor technologies for rapid pathogen detection and PFAS mitigation in seafood and food systems. She also works on food quality, product development, waste valorization, and predictive microbiology, with extensive experience implementing GMP and SSOP systems in the food industry.
Alex Gayton, MS, RD is a registered dietitian (RD) and has been with University of Maine Cooperative Extension since January 2020. Alex is a supervisor and the social media coordinator for the Expanded Food and Nutrition Education Program’s (EFNEP) Facebook, Instagram, and TikTok pages. She also is the creator of the Mainely Dish recipe video series. Alex loves food photography, baking, and cooking plant-based meals!