Tip: Sometimes people forget that chipotles are still hot and can give you jalapeno hands if you touch the seeds. Use squares of plastic wrap to protect your fingers when handling them. Seed them by placing one flat on the cutting board, splitting it down the center with a paring knife, and using that knife to scrape out the seeds. Immediately scrape the seeds into the sink and wash them away, to prevent any further contact, then place the seeded chipotle directly in the blender. The reason we're removing the seeds, in case you're wondering, is that the seeds are really spicy. With the seeds removed, you can use more chipotles, thus getting more smoky flavor without all the heat. If you prefer a completely nonspicy version, use 1 roasted red pepper (homemade or from a jar) in place of the 4 chipotles.