Make 4, ¼# patties about ½” thick
Season both sides of the burgers with the salt & pepper.
Place the patties in the fridge for 30 minutes.
While the patties chill, chop the onions.
Heat a sauce pan over medium heat and add the oil
Add the diced onions to the oil and stir
Add the salt to the onions, cover and cook for 3 minutes to let them release their juice.
Add the beef broth and wine and cook for another 5 minutes over medium heat to steam the onions.
Remove the lid and turn up the heat to reduce the liquid. Add 2 Tbsp (a 1/4 of the stick) of the butter to the onions and stir through.
Place the buns on a sheet pan and lightly toast them under the broiler.
Remove the buns from the broiler and butter each top bun generously with the rest of the softened butter.
Check your onions, don’t let them dry out or burn. You want them soft and creamy.
Heat your skillet over high heat and add 2 Tbsp vegetable oil.
Place the patties in the skillet, don’t touch them for 3 minutes so that they brown properly.
After three minutes, flip and cook for one minute on the other side.
Add a slice of cheese to each burger for another 30 seconds.
Place the burgers on the bottom buns, place ¼ of the onions on each burger, and then place the top bun on top of each burger.