01 -
In a medium bowl, whisk together balsamic vinegar, soy sauce, apple cider vinegar, minced garlic, salt, black pepper, and olive oil until well combined.
02 -
Place the skirt steak in a sealable plastic bag and pour the marinade over it. Seal the bag, removing as much air as possible, and massage the marinade into the meat. Refrigerate for at least 30 minutes but no longer than 2 hours.
03 -
Remove steak from marinade and discard excess liquid. Grill or pan-sear the steak on medium-high heat for 6-8 minutes per side, depending on thickness and desired doneness.
04 -
Transfer the cooked steak to a cutting board and let rest for 10 minutes to allow juices to redistribute. Slice against the grain before serving.