Place the salt, chipotle chile powder, and the zest of one lime in a food processor.
Pulse just a few times until everything is incorporated.
Pour the salt into a container for storing. The flavors will continue to build over time. Place a pinch of dry, uncooked rice in the container to help keep it from caking and absorbing moisture.
If your salt is wet from the lime zest, spread it out on a baking sheet to dry before putting in a container.
Notes
This will be moderately spicy. Cut back to 1/2 teaspoon for a lighter spice.I love to use jars like this to store the flavored salts in, but you can also use empty spice containers. These jars would fit approximately half of one batch of salt.It is best to use a small food processor to ensure the blade can reach the ingredients, although a larger one will still work.