If you can't find chipotle peppers in adobo sauce and you don't have time to order them online, don't panic! You can make your own substitute by mixing 1 tablespoon tomato paste, 1 tablespoon cider vinegar, ½ teaspoon smoked paprika, ½ teaspoon ground cayenne pepper, a pinch of garlic powder, and a pinch of salt together. Use this mixture in place of the 2 tablespoons of chipotle peppers in adobo sauce.