We compared cheeseburgers from McDonald's, Burger King, Wendy's, Sonic Drive-In, Shake Shack, and Checkers. Sonic's burger ...

To assemble the burgers, smear sauce on inside of top and bottom buns. Add 1-2 lettuce leaves on bottom, followed by tomato, onion and burger patty. Top with a few pickle slices and enjoy.

The Whopper, first introduced in 1954, is another classic American burger that's known for its flame-grilled flavor. The In-N-Out Double-Double, introduced in 1963, is a popular choice on the West ...