Combine orange juice, lemon juice, and lime juice for marinade in a large glass or ceramic bowl. Add cilantro, soy sauce, garlic, chili powder, cumin, paprika, black pepper, chipotle pepper, and oregano; stir to combine.
2
Slowly whisk in olive oil until well combined. Remove 1 cup of the marinade and place in a small bowl; cover with plastic wrap and refrigerate for use after the steak is cooked.
3
Place steak between two sheets of heavy plastic (resealable freezer bags work well) on a solid, level surface. Firmly pound steak with the smooth side of a meat mallet to a thickness of 1/4 inch.
