I only buy peanut butter of the all-natural variety, meaning the only ingredients are roasted peanuts and salt. The stuff is delicious, but it separates in the jar and it can be a pain (sometimes even a mess) to stir it back together.

That is, until I discovered this peanut butter mixer. It's a curved mixing rod that pokes through a "lid" and attaches directly onto a standard-sized peanut butter jar. The process is easy: assemble the mixer, turn the crank until everything is mixed well, then pull the mixing rod out of the lid clean. You can watch the process in this video.

The mixer is $13 on Amazon. They also make a version for smaller jars.