Using a funnel, put the flour into the jar. Shake just a bit or tap it on the counter gently to allow it to settle.
Next, put in the baking powder, baking soda, and salt. Shake just a bit.
Put in the M&Ms (or optional chocolate chips, dried cranberries or nuts – just make sure you use no more than 1 cup of these extra goodies for each jar, otherwise, the cookies will be too soft and won’t cook well).
Put in the brown sugar. Shake just a bit.
Put in the plain sugar. Shake just a bit.
Finally, add a tiny layer of M&Ms at the top. Shake just a bit more, but not so much they sink into the sugar
Once the ingredients are layered nicely in the jar, place the label inside and add the lid and band, and tighten.
Cut a round scrap of fabric (I like to use an old outworn flannel sheet in holiday colors or festive fabric) a bit larger than the size of the lid.
Place it over the lid and tie twine, string or ribbon around the fabric to secure it. HOW CUTE!