Combine burger butter ingredients and place in freezer up to one day ahead.
Divide ground beef into 4 large (4 oz) and 4 smaller (3 oz) ball. Flatten the 4 oz balls with your hands as thin as you can.
Place 2 tbsp of frozen burger butter in center. top with 1 slice of cheese, broken into 4 pieces.
Flatten smaller balls so to they are big enough to cover the cheese. Place on top of cheese, pressing meat down into bottom patty. Pick up patty and shape with your hands, sealing edges.
Grill burgers 5 minutes on one side, flip and grill additional 3-5 minutes.Toast burger buns.Slice tomato and plate with lettuce.
Assemble your burgers and serve, maybe a little ketchup on top.And maybe some fries on the side.Enjoy!
Notes
I have made these as sliders. Still a hearty sandwich, just a bit smaller. Larger patties at 2 oz. and smaller ones at 1 oz. 1 lb makes 5.