2tablespoonsbrown sugar, preferably dark brown, but light will work.
Instructions
Combine marinade ingredients in the 9"x13" and whisk together. Set aside.
Place the flank steak smooth side up and score the top in 1" sections. See blog post for reference photos.
Move the steak to the marinade. Marinade each side of the steak for 30-45 minutes/side. When the scored side is up, make sure to spoon extra marinade into the scores.
As the steak is close to the end of the marinade, turn the oven to high broil with a rack placed as close to the top of the oven as possible with out the steak touching.
Place the steak scored side up on the broiler pan and place under the broiler. Broil for approx 3 minutes, then flip the steak and broil for another 3 minutes.
While the steak is under the broiler, melt the butter in the microwave and combine with the bread crumbs and have the blue cheese crumbles ready.
After broiling 3 mins/side, remove from the oven and flip one more time so the scored side is up. Press the blue cheese crumbles over the top of the flank steak into the scores. Sprinkle the bread crumbs over the top and place back under the broiler for about 5 more minutes until the top is browned and the cheese is bubbly.
Allow to rest 10-15 minutes, then slice thin against the grain and enjoy!