All flours, but especially wheat flour, should be kept chilled. This is due to the oils in the wheat germ which make it go rancid. Store it in an airtight container in the fridge for up to six months.
To check your flour, you can try the sniff test. Flour should be odorless; if it smells bitter or sharp, then the oils are rancid.
2. Peanut Butter
The oils in natural nut butters, like our favorite, peanut butter, can easily spoil at room temperature. Especially if they do not contain preservatives, these kinds of butter are prone to mold growth, so they will last much longer if refrigerated.
Butter can last at room temperature for about 10 to 14 days, but it will spoil eventually. Butter lasts longer than other dairy goods due to its high fat content, which makes it harder for bacteria to grow. If you are not using the butter daily and it’s been out for over 14 days, put it in the fridge to last longer.Related: 12 Helpful Hints for Storing Your Produce to Maintain Freshness