Cast iron grill pan hamburgers lets you enjoy the grilled taste of hamburgers without having to step outside! These grill pan hamburgers are easy to make indoors and are juicy and delicious.
Gently combine all ingredients until just evenly mixed.
Separate into 4 equal patties being careful not to over-handle them.
Add 1 tablespoon oil to a heavy grill pan or skillet and heat over medium-high heat.
Place patties in pan and cook for 2 minutes. Turn the patties one-quarter of a turn to unstick them from the pan and continue cooking an additional 3 minutes on the same side. Flip and continue cooking to desired doneness (about 3-5 minutes).