Buy: Organic berries
One exception from the fresh produce rule is organic berries. If they’re in season, you can find a great deal on the berries. Of course, berries have great health benefits, and they can be pretty pricey.

Buy Organic Berries
Skip: Flour, baking powder, and dried yeast
Baking ingredients like flour, baking powder, and dried yeast have a limited shelf life. People have cautioned buying these items in bulk since they can go bad rather quickly. So skip the big purchase and buy them in smaller amounts.

Skip Flour, Baking Powder, And Dried Yeast