This is a trick my mother taught me. Apparently 40 years ago or so, about the time this blender pictured was bought, manufacturers used to include a mason jar in the box with the blender. Mom recalls even a booklet that listed the many things one could make with the mason jar blender, including ground spices, whipped cream, and peanut butter. We use this trick most often to make whipped cream. The blender whips it right in the jar, so if we have extra, it’s already in a jar for storage. And it is easier when it comes to making small quantities. I was complaining the other day that I needed a spice grinder. My mother reminded me of the mason jar trick and it worked perfectly. Here’s how to do it. I’m using walnuts to demonstrate, but you could use this trick with just about anything you want to blend, chop, or grind.