Step 1

In a medium skillet over medium heat, gently toast the chile de árbols for 30 seconds to a minute on each side.

Step 2

Add two cups of water to the skillet, turn off heat, and allow to sit for 20-30 minutes.

Step 3

Transfer the chile de árbols to a blender along with 1/4 cup of the cooking liquid, vinegar, garlic, and salt. Pulse until smooth. Strain with a fine sieve if desired, otherwise, serve or refrigerate for later.