In a large bowl, combine ground beef with taco seasoning until well mixed. Divide ground beef into 8 equal portions, about 4 ounces each for a 1/4-pound burger.
Cut buns in half.
In a medium skillet, toast the cut side of the rolls (if desired) with a small amount of butter. Remove from skillet and set aside.
Grill burgers 5-8 minutes on each side or until desired doneness. Place a slice (or two) of Cooper Cheese on top of each burger and grill until cheese is melted. Remove from grill.
On the bottom portion of each bun, dollop a generous helping of guacamole. Add a spoonful of chunky salsa. Add some shredded lettuce if desired. Add the cheese-topped burger, then top with tortilla chip strips. Cap it off with the top of the bun, serve and enjoy!