All ingredients are available at local groceries. The chipotle peppers are usually in the Mexican foods section. Two of the peppers, with 2 tablespoons of the sauce they are packed in is sufficient. Use either a gallon size plastic bag, or a ceramic baking dish for the marinating process. Combine all ingredients except steaks, stirring or shaking to combine. Add the Kansas City Strip Steaks in a single layer, turn to cover with marinade. This can be ready in two hours, (turn the bag or the steaks in the marinade after the first hour) but is best if steaks are marinated overnight. When ready to use steaks, charcoal grilling is best to enhance the smokey flavor of the marinade.