- cooking spray
- 1/4 cup mayonnaise
- 1 tablespoon Dijon mustard
- 1/4 teaspoon chopped fresh rosemary
- 1/4 teaspoon garlic powder
- 1/8 teaspoon salt
- 1/8 teaspoon ground black pepper
- 4 skinless, boneless chicken breasts
- salt and ground black pepper to taste
- Preheat oven to 350 degrees F (175 degrees C). Line a baking sheet with parchment paper. Grease with cooking spray.
- Mix mayonnaise, Dijon mustard, rosemary, garlic powder, salt, and pepper together in a bowl.
- Season chicken breasts lightly with salt and pepper. Arrange seasoned-side down on the baking sheet. Spread 1/4 of the mayonnaise mixture over each chicken breast with a spatula.
- Bake in the preheated oven until center is no longer pink and top is lightly browned, about 35 minutes. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).