Add buttermilk to chicken in a ziplock bag or airtight container and marinate in the refrigerator overnight or for at least 30 minutes.
Preheat oven to 350º. Line a rimmed baking sheet with aluminum foil.
Rinse and pat chicken dry with a paper towel. Drizzle with olive oil and salt and pepper both sides. Place on prepared baking sheet.
Bake for about 35 minutes until internal temperature at the thickest part is 165º.
Barbara's Notes + Tips
Make sure you rinse off the buttermilk before preparing the chicken.
You can add any seasoning you like before baking, try taco seasoning, or herbs de Provence or seasoned salt.
Chicken can vary in size which will affect the cooking time. If you have. very large pieces, it may take longer than 35 minutes, so be sure to rely on a meat thermometer.