Split each pound of ground beef into three equal portions (easiest to do this with a kitchen scale). Each of these will be one ⅓ lb burger.
2 lbs 85/15 ground beef
Roll out a large rectangular piece of plastic wrap. Take one of the ⅓ lb ground beef portions and cut it in half (to create two, ⅙ lb pieces). Place one of these smaller portions of ground beef onto one end of the plastic wrap and use the plastic wrap to help you shape it into a large, very flat circle. Press down with your fingers, gently round the edges, and make sure it is thin (about ¼-⅓" thick)! Repeat for the other half of the burger, placing it on the opposite side of the plastic wrap rectangle.
Lightly sprinkle Hickory Burger Seasoning (or seasoning of your choice) on each thin patty to taste. Then, place about 2 teaspoons of the grated butter onto the center of one of the patties—this will be the bottom patty.
Hickory Burger Seasoning
Optional—Add a few small, very thin slices of brick cheese on top of the butter.
Small slices of brick cheese
Using the plastic wrap to help you, flip the top patty (one without butter) onto the other patty, effectively sandwiching the butter (and optional cheese) in between the patties. The sides you seasoned should both be on the inside of the burger.
Gently pinch and press the edges of the burger to seal them.
Repeat this process for the remaining burgers!