Buy: Organic berries
Organic berries are the only exception to the fresh produce rule we mentioned earlier. When they are in season, you can get a good deal on them. Berries might be delicious and healthy, but they can be pricey.
Skip: Flour, baking powder, and dried yeast
Baking ingredients such as baking powder, dried yeast, and flour have a short shelf life. You should not buy them in bulk since they tend to go bad in no time at all. It is better to get them in small amounts.