Begin by cutting the skirt steak into manageable pieces that fit your skillet. Pat the meat dry with paper towels, then generously season both sides with salt and pepper to enhance its natural flavors.
Heat oil in a large skillet over medium-high heat until it shimmers. Once hot, add the seasoned steak and sear for about 2-3 minutes on each side for medium-rare or until your desired doneness is achieved. After cooking, transfer the steaks to a plate to rest.
In another skillet, melt butter over low heat and add minced garlic once melted. Stir continuously with a spatula until the garlic turns golden brown, being careful not to let it burn as it cooks quickly. Remove from heat immediately once browned.
Slice the rested steak against the grain into thin strips for maximum tenderness. Pour the prepared garlic butter sauce over the sliced steak and garnish with freshly chopped parsley before serving immediately for a delightful meal experience.