Add 2 tablespoons of butter in a skillet together with the sliced onions. Cook for 5 minutes over medium-high until the onions have softened.
Transfer the cooked onions to a plate and set aside.
Meanwhile season the steaks on both sides with onion powder, salt, and pepper.
Heat a skillet on medium-high heat and cook the steaks from both sides for 2 minutes each side. Remove and set aside.