Seems a little crazy to dump a cup of Cola on your steak but here you go. I have had this recipe for a while and I guess all the stuff in that Coke works magic on your steak. I use regular Cola Soda ( not diet) and this marinade will tenderize your flank steak or london broil. Marinate overnight, it’s best. This recipe was in Living magazine and it looked good and it was!
1 cup cola ( any kind will do, just not diet)
1/4 cup red-wine vinegar
1/2 white/yellow onion , grated
1 1/2 tablespoons garlic, chopped ( app. 3 garlic cloves)
Kosher Salt and Freshly Ground Black Pepper
1/4 cup safflower oil
1 Flank Steak or London Broil
Combine cola, vinegar, onion , garlic, 1 teaspoon pepper, and the oil in a bowl. Place steak in a large plastic bag. ( Hefty Ziploc are the best) Pour the marinade over the steak. Seal bag, press extra air out of bag. Refrigerate overnight. You might want to reserve a little bit of the marinade in a seperate container. When you take steak out the next day , you can brush it with remaining marinade after you grill for extra flavor.
Let steak stand at room temperature for at least an hour or so before you’re going to cook. Remove steak from bag, and discard the bag and marinade. Brush off any and all remaining onion and garlic from steak, or else it will just burn on grill. Season with kosher salt and freshly ground black pepper right before grilling, I am pretty liberal with the s and p.
Preheat grill to medium high, and I spray grill with Pam grill spray. If no spray , oil the grates . Grill Steak for probably 10 minutes per side for medium. All grills are different and you’ll have to see for yourself how long. Transfer steak to a cutting board and let it rest for a bit. I put foil over it, this steak is good even when it sits for a while and pretty good cold the next day on a salad.