It's not free Biscuit Tacos, but it's arguably even more valuable: for its Cinco de Mayo offering, Chipotle sneakily posted its guac recipe on its website Sunday morning. It's now been discovered, and nothing will ever be the same.
The ingredient list is actually pretty standard stuff: two ripe Haas avocados, 2tsp lime juice, 2tbsp cilantro (chopped), 1/4 cup of red onion (finely chopped), 1/2 jalapeño with seeds (finely chopped), and 1/4tsp kosher salt. But Chipotle also included specific instructions, so hopefully you can divine their magic at home. And if not, at least there's this beguiling GIF to console you: