Preheat the oven to 250 degrees F. Preheat a griddle to 350
degrees F.
Combine the onion powder, garlic powder, pepper, and salt in
a small bowl. Set aside.
Line a jellyroll or sheet pan with parchment paper, and place
the ground chuck in the middle of the pan. Cover the meat with a
large sheet of plastic wrap. Roll meat with a rolling pin until
it covers the surface of the pan; it should be very thin. Remove
the plastic wrap, and sprinkle the meat with the seasoning
mixture. Fold the meat in half, from side to side, using the
parchment paper. Use a pizza wheel to cut the meat into 8 even
squares.
Wrap the buns in foil and place in the oven for 5 to 10
minutes. Meanwhile, place the burgers on the griddle and cook
for 2 to 3 minutes per side.
Remove the buns from the oven. Spread a small amount of
mayonnaise on each bun and top with the burger and any other
condiments, as desired. Serve immediately.
