Confusion over where to store common food items is leading to domestic disputes, according to a survey indicating that three-quarters of people are baffled by the best storage methods.
Specialist dietitian Nichola Ludlam-Raine offers guidance on a range of products, from eggs and butter to fruits and vegetables, to help consumers avoid spoilage and maintain quality.
Refrigeration Guidelines
Eggs, a point of contention for many, are best stored in their original carton on a refrigerator shelf rather than in the door compartment, which experiences more temperature fluctuations. This placement helps prevent eggs from cracking when boiled.
Butter, while a dairy product, can be challenging to spread when directly from the refrigerator. However, modern formulations often include extra oil and water to improve spreadability. While pure butter might be stored in a cool larder in colder weather, it is generally recommended to keep it in the fridge.
Bread is best stored in a bread bin at room temperature. While refrigeration can slow mold growth, it causes the starch to firm up quickly, leading to staleness. Cakes, due to their sugar content, can be kept in an airtight container in a cool, dark place.
Most fruits ripen best at room temperature. Bananas should always be stored outside the fridge and kept separate, as they release ethylene gas that accelerates the ripening of other fruits. Apples can be kept in a bowl, but will last longer in the refrigerator; however, they should be removed from any chiller drawer to prevent spoilage of other items. Avocados should be ripened on the counter before being refrigerated.
Vegetables such as onions and garlic are suitable for storage in a pantry until cut. Potatoes, contrary to some beliefs, last longer when refrigerated, despite past concerns about "cold sweetening." Leafy green vegetables should always be kept chilled to preserve their nutrients. It is advised to keep vegetables in their original packaging until use, rather than washing them beforehand.
Tomatoes taste best and ripen properly at room temperature, away from direct sunlight. Lettuce and cucumbers, however, should be kept chilled in their packaging.
Opened jams and marmalades are recommended for refrigeration due to the preservation benefits of jarring, which is compromised once exposed to oxygen. Nut butters can be stored in a cool, dark cupboard, and honey should remain at room temperature to prevent crystallization. Kate Hall, a food waste expert, advises using a clean utensil for jams and spreads and never attempting to remove mold.
Chocolate is best kept in a cool, dry place. Refrigeration can cause "sugar bloom," a whitening effect that impacts taste and texture. An airtight container may be suitable during heatwaves.
Olive oil should be stored in a cupboard, away from light and heat, to maintain its quality. If kept on a countertop, it should be positioned away from the oven hob.
While ketchup contains preservatives like vinegar and sugar, manufacturers like Heinz recommend refrigeration after opening. Mustard should always be refrigerated once opened. However, ketchups with high sugar and vinegar content may pose a low risk if consumed quickly when stored at room temperature, though chilling is advised during heatwaves.