When cooking chicken breast in the oven, the temperature and time will depend on the recipe and the size of the chicken breast. Here are some general guidelines from the search results:

• The best temperature to bake chicken breasts is 375°F or 425°F.
• A boneless, skinless chicken breast that weighs 6-8 ounces will take about 18-20 minutes to cook at 425°F.
• A bone-in, skin-on chicken breast that weighs 10-12 ounces will take about 35-40 minutes to cook at 375°F.
• The internal temperature of the chicken breast should reach 165°F to ensure it is fully cooked.
• To check the temperature, use an instant-read thermometer inserted into the thickest part of the chicken breast.

Its important to note that cooking times may vary depending on the size and thickness of the chicken breast, so its always best to follow a specific recipe or use a food thermometer to ensure the chicken is fully cooked and safe to eat.