Prep Time: 10 minutes
Cook Time: 10 minutes
In a shallow dish mix beer with brown sugar. Place patty in beer mixture and marinate in refrigerator for about 1 hour. Remove and place on grill.
Combine seasoning ingredients, sprinkle evenly over patty and cook to desired doneness. Meanwhile, sauté jalapeño in olive oil, cooking until soft; slice and discard stem and seeds.
While still on grill, place jalapeño directly on top of burger followed by cheeses. Allow time to melt cheeses.
Place burger on bottom of bun. Top with avocado. On bun top, place lettuce, tomato, onion and pickle. Serve burger open-faced.