Step 1

Form ground beef into 3oz balls.

Step 2

Lay out sliced onions on the griddle, flat top, or cast iron pan, and let cook for 1-2 minutes (hit with additional oil if needed).

Step 3

Flatten ground beef into onions (if sticking, you can put parchment down first on top of the burger in between the smasher), and lift gently.

Step 4

Brush yellow mustard over ground beef patties and season with s/p or burger seasoning.

Step 5

Flip burgers and add cheese.

Step 6

Toast the buns just until golden.

Step 7

Make burger sauce, whisking all the ingredients in a small bowl.

Step 8

Once burgers are cooked to your liking (note: they cook quick!) build the burgers with toppings of choice (I love pickles and the burger sauce along with lettuce and tomato!).