Melt butter in a 12-inch skillet over medium-high heat. Add minced garlic, chipotle and cook until fragrant, about 30 seconds. Stir in ½ cup orange juice, Worcestershire, and ½ cup cilantro and bring to boil. Add chicken and simmer, covered, over medium-low heat until meat registers 160 degrees, 10 to 15 minutes, flipping chicken halfway through cooking. Transfer to plate and tent with foil.
3 Tablespoons unsalted butter, 4 cloves garlic, 2 tsps minced chipotle chiles in adobo sauce, ½ cup fresh squeezed orange juice, 1 Tbsp Worcestershire sauce, 4 chicken breasts,
Increase heat to medium-high and cook until liquid is reduced to ¼ cup, about 5 minutes. Off heat, whisk in 1 teaspoon mustard. Using 2 forks, shred chicken into bite-sized pieces and return to skillet. Add remaining cilantro to skillet and toss until well combined. Season with salt and pepper. Serve with tortillas.
¾ cup fresh cilantro leaves, 1 tsp yellow mustard, Salt and pepper, 12 flour tortillas