How should Skippy® peanut butter be stored? Unopened and opened jars of peanut butter may be stored at room temperature. Keep the jar tightly closed and store in a cool place. Storage temperature affects product quality. Excessive heat will accelerate the loss of fresh flavor and cause oil separation. Cold temperatures, even above freezing, can change peanut butter's consistency, texture, and thickness. Peanut butter may be refrigerated to retain the product's optimum flavor, but it will not be as easy to spread. Freezing is not recommended. GO BACK