Gather and prepare your ingredients: chop parsley, mince garlic, and cut butter into cubes.

Pat the skirt steak dry and season both sides with kosher salt and black pepper.

Heat a skillet over high heat, add oil, and cook the steak for 2-3 minutes on each side.

Remove the steak and let it rest. In the skillet, melt the butter and sauté minced garlic for 30 seconds.

Slice the steak against the grain and pour the garlic butter over it, garnishing with chopped parsley.