If you choose not to marinate the chicken in a fajita recipe, there will be several noticeable differences in the final outcome of the dish:
Flavor: Marinating is a process that allows the chicken to absorb the flavors of the marinade, which typically includes a mixture of various spices, herbs, acids (like citrus juice or vinegar), and oils. Without marinating, the chicken may lack the depth of flavor and complexity that comes from the infusion of these ingredients.
Tenderness: Marinating helps break down the proteins in the chicken, making it more tender and juicy. Without marinating, the chicken might be slightly tougher and less succulent.
Moisture: Marinating also helps retain moisture in the chicken during the cooking process. Without the marinade, the chicken may be drier, especially if it's cooked at high temperatures for an extended period.
Uniformity: Marinating ensures that the flavor is evenly distributed throughout the chicken pieces. Without marinating, you may find that the outer parts of the chicken have more flavor while the interior remains relatively plain.
Caramelization and Browning: Marinating often contains sugars and other compounds that can aid in caramelization and browning of the chicken when cooked. This enhances the appearance and taste of the final dish.
While you can still cook chicken without marinating it for fajitas, the dish may not have the same depth of flavor and tenderness that marinating imparts. If you're short on time, consider marinating for at least 30 minutes to an hour, as even a short marinating time can make a noticeable difference. However, if you don't have the time to marinate, you can still enjoy a decent fajita by ensuring you season the chicken well with spices and herbs before cooking.