Ingredients
Equipment
Method
- Mash the butter with the garlic, parsley, chives, thyme, lemon zest, salt and pepper. Roll into a log in plastic wrap and chill at least 30 minutes.
- Pat the steak dry and note the direction of the grain. Salt all over, at least 40 minutes and up to 24 hours ahead, uncovered on a rack in the fridge. Take it out 20 to 30 minutes before cooking and add the pepper.
- Heat a grill to high direct heat (450 to 500°F / 230 to 260°C). Clean and oil the grates.
- Grill the steak 4 to 6 minutes per side, flipping once or twice, with the thicker end over the hottest spot.
- Remove at 125 to 130°F (52 to 54°C) for medium-rare or 135 to 140°F (57 to 60°C) for medium. USDA recommends 145°F (63°C) plus a 3-minute rest.
- Top with slices of herb butter and rest 5 to 10 minutes.
- Cut into 2 or 3 sections along the grain, then slice each thinly (1/4 inch / 6 mm) against the grain. Spoon over the juices and remaining butter, and finish with flaky salt.
Notes
Stovetop: cut the steak into 2 or 3 pieces and sear in a hot cast-iron skillet 3 to 4 minutes per side, to the same temperatures. Calories are an estimate from USDA FoodData Central values for broiled flank steak (a similar cut) plus the herb butter. Refrigerate leftovers within 2 hours and eat within 3 to 4 days.
