Questions about food: natural peanut butter

As the title would suggest, I have some questions about food. So I'm starting a little series, just in case you know the answers. (Ok, so far, I have two questions in mind, but that still counts as a series, right?)


So, first up: natural peanut butter. The Hubs and I recently bought a jar of natural, nothing-but-roasted-peanuts-and-salt kind of peanut butter.

We kept it in the fridge and stirred it before using it. It tasted pretty good, but the consistency was weird. It started out runny and gross-looking. Then, near the bottom of the jar, it got all clumpy. It was hard to get out of the jar and a little tricky to spread.

What's that about? Did we not stir it enough each time? Is natural peanut butter always like that? Is it just the brand (in this case, Trader Joe's)?

We actually just bought another jar, because we wanted to give it one more chance. But, this time, we want to get it right!

What do you know about natural peanut butter?

Photo by amanky.