One of my favorite quotes from "Reno 911!" is when Trudy is talking to her coworkers in the background of a scene and you hear her say, "You take water, and you freeze it. That's the recipe." Making your own peanut butter or almond butter is almost as easy as Trudy's ice recipe, not to mention waaaayyy cheaper than buying it in the jar. Buy almonds, peanuts, walnuts, hazelnuts, sunflower seeds -- really, almost any nut or seed will do -- in the bulk section at the grocery store. Opt for roasted nuts or roast them yourself for the best flavor and easy blending. You can add a bit of salt or honey for flavor, but I've found that it's not usually necessary.
Recipe To Try: My friend Katelyn makes the most delicious homemade nut butters, and when I asked her for her recipe, she said, "Just buy roasted nuts, put them in your food processor, and process the crap out of them," which pretty much sums it up. But here's a real recipe if you want a bit more guidance.