Ingredients
Scale
- 1.5 pounds flank steak
- 1/2 cup balsamic vinegar
- 1/4 cup olive oil
- 4 cloves garlic, minced
- 1 tablespoon brown sugar (packed)
- 1 teaspoon dried rosemary
- 1 teaspoon kosher salt
- 1/2 teaspoon black pepper
Instructions
- Step 1: In a medium bowl, whisk together the balsamic vinegar, olive oil, minced garlic, brown sugar, dried rosemary, salt, and pepper until the sugar is dissolved. This mixture forms the marinade.
- Step 2: Place the flank steak in a large zip-top bag or a shallow dish and pour the balsamic marinade over the steak, ensuring it is fully coated. Seal the bag (or cover the dish) and refrigerate for a minimum of 4 hours, or up to 12 hours, turning the steak halfway through.
- Step 3: Remove the steak from the marinade 30 minutes before cooking to allow it to come closer to room temperature. Preheat a grill (or a cast-iron skillet) to high heat. Discard the excess marinade.
- Step 4: Grill the steak for 4 to 6 minutes per side for medium-rare (internal temperature of 130-135°F), or adjust cooking time based on desired doneness. Use tongs to transfer the steak directly to a cutting board once cooked.
- Step 5: Allow the cooked flank steak to rest undisturbed for 10 minutes. This is critical for retaining the juices. After resting, use a sharp knife to slice the steak thinly against the grain before serving.
Notes
- To prevent leftovers from drying out, store any un-sliced portions of the cooked flank steak in an airtight container for up to three days.
- Reheat slices gently in a 300°F oven or toaster oven wrapped loosely in foil for about 5-7 minutes, ensuring they are just warmed through and not overcooked, which would toughen the meat.
- The intense balsamic marinade pairs beautifully with starchy sides like creamy garlic polenta or roasted potatoes, and a fresh garnish of chopped parsley brightens the presentation.
- Since the marinade includes brown sugar, keep a close watch while grilling, as the sugars can caramelize quickly and risk burning if the heat is uneven or excessively high.
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Method: Stovetop
- Cuisine: American