This Marinated Grilled Sirloin Steak comes off the grates tender and juicy. A brown sugar and balsamic marinade does the heavy lifting, and a high, fast sear does the rest. It's steakhouse flavor on a Tuesday-night budget. You can have it on the table after less than ten minutes of cook time.
Place the steaks in a shallow dish. Prick all over with a fork.
In a small bowl, combine the oil, brown sugar, vinegar, Worcestershire sauce, garlic, rosemary and salt.
Pour over the steaks, and marinate in the refrigerator for at least an hour, or up to 4 hours.
Transfer the steaks to a plate, and season on both sides with salt and pepper. Let sit at room temperature for an hour to allow the salt to work its magic on the muscle fibers.
Preheat your grill to 450°F - 500°F. Brush the grates with oil.
Cook for 3 to 4 minutes per side, or until the internal temperature is 130°F for medium rare.
Move to a wire rack set on top of a rimmed baking sheet, top with butter, and tent with foil.
Let rest for 5 minutes before serving.
Notes
Doneness: Pull about 5°F below your target to allow for carryover cooking. Medium-rare is 130°F (lands at ~135°F after resting).
Ninja Flex Flame: Set to 450°F, grill the first side 3 minutes, and check the second side at 2 minutes — the convection cooks it faster.
Don't over-marinate: 1 to 4 hours only. The acid keeps working and will mush the surface past that.