According to the USDA, butter is safe at room temperature. But if it's left out for several days at room temperature, it can turn rancid causing off flavors. The USDA does not recommend leaving it out more than one to two days. ... You can store butter in a butterdish or a popular French butter keeper.Mar 2, 2020
In agreement with USDA and FDA guidelines, most butter companies say to keep butter refrigerated. ... Keeping butter in an airtight container like a crock makes butter last at room temperature longer (about 2 weeks), but when room temperature rises above 70° F, all butter should be refrigerated.Jul 16, 2015