Step 1In a small mixing bowl, combine the chipotle, garlic, Mexican crema and mayonnaise. Mix until well combined. This makes about two-thirds cup chipotle crema, which will keep, covered and refrigerated, for up to 1 week.
Step 1In a small mixing bowl, combine avocado and lime juice. Season with one-eighth teaspoon salt, or to taste. This makes a scant one-half cup avocado spread, which will keep, tightly covered and refrigerated, up to 1 day.
Step 1In a large bowl, combine the beef, chipotle pepper, adobo sauce, salt and pepper. Mix well to combine, but do not overmix. Divide the mixture in half and form the portions into patties to fit the buns.
Step 2Heat a large skillet over high heat. Add enough oil to form a thin film on the bottom of the pan, about 2 tablespoons, then add the burgers to the skillet.
Step 3Cook the burgers until set and browned on one side, about 3 minutes, then flip. Top the burgers with the cheese, then cover the pan with aluminum foil. Cook an additional 3 to 4 minutes for medium-rare burgers, or until the burgers have reached desired doneness.
Step 4Assemble the burgers: Spread the chipotle crema evenly on each cut side of the toasted buns. Sprinkle the minced papalo leaves over the crema on the cut sides of the bun tops. On the bottom halves of each bun, sprinkle the crushed tortilla chips then top with a cheese-topped patty, a slice of onion and equal amounts of the avocado spread. Top the burgers with the bun tops and serve immediately.