If you love baking cookies and like to keep them fresh longer, the next effect is to select the right cookie jar. The best cookie jars should also have an airtight seal and be built to be quite sturdy ...

Combine flour, baking powder, baking soda, and salt in a small bowl. Pour into the bottom of a 1-quart mason jar. Top the flour mixture with M&M's, dropping them in lightly, so that they don't sink ...