how long to cook chicken breast in oven at 350 depends on the thickness of the chicken breasts. For boneless, skinless chicken breasts that are approximately 4-6 ounces (113-170 grams) each, the average cooking time is around 20-30 minutes. However, it is essential to note that individual ovens may vary in temperature accuracy, so using an instant-read meat thermometer is highly recommended. Checking the Internal Temperature: More Visit-https://thecannabidiol.co/how-long-to-cook-chicken-breast-in-oven-at-350/