Place your London Broil or flank steak on a cutting board and use a meat mallet to gently pound both sides, breaking down connective tissue for extra tenderness.

In a large freezer bag, combine the marinade ingredients and stir or shake until thoroughly blended. Set aside 2 tablespoons of marinade for drizzling later.

Add the steak to the bag. Remove extra air, seal tightly, and massage the marinade into the meat through the bag.

In a medium bowl, combine softened butter and herb ingredients. Mash together until completely blended.

Scoop the blended butter mixture onto a sheet of plastic wrap. Shape into a log and refrigerate until firm.

Remove steak from the marinade and place on a foil-lined baking dish. Let it come to room temperature for 20 minutes.

Preheat your oven’s broiler to high and cook the steak for 5-7 minutes per side, checking for doneness with a meat thermometer.

Transfer the steak to a cutting board and rest for 10 minutes before slicing.