Make your jar first by trimming your napkin to fit nicely on the jar. I cut off 3 of the four sides, leaving just the clean front of the skull and flowers.
Coat the jar with a layer of mod podge, then immediately place the prepared skull napkin on the surface of the jar. Take care to place it carefully because the napkin is thin and fragile--and will tear if you try to move it after the napkin comes in contact with the mod podge. One thing to note: I left the measurement marks on my mason jar visible on the back of my jar, because I thought it would be neat to see how much of each ingredient is in the jar. Allow this first layer of mod podge to dry completely.
Coat the napkin-covered jar with a second layer of mod podge, just to provide extra protection for the napkin. Allow this second layer of mod podge to dry completely.
Fill your jar with the cookie mix. I tried a couple of variations, but my preferred choice was to split the flour into 3 portions. Then I just added the darker ingredients between these 3 layers with the sprinkles in the very middle.
Once filled, place the lid on the jar and secure it tightly.
Cut your fabric to about a 5-inch by 5-inch square or a 6-inch diameter circle.
Print your recipe card on cardstock paper and cut to size.
Punch a hole in the top of the recipe card and thread the string or raffia to it.
Place the piece of fabric on top of the jar and secure it in place with the string or raffia and be prepared to gift!