In a small bowl, whisk together maple syrup, Dijon mustard, olive oil, garlic powder, salt, and pepper to create the sauce.
Place the chicken breasts in a baking dish. Pour the maple mustard sauce over the chicken, ensuring it's evenly coated.
Bake for 20-25 minutes, or until the chicken is cooked through and the sauce is slightly thickened and caramelized. The internal temperature of the chicken should reach 165°F (74°C).
Let the chicken rest for a few minutes before serving. Garnish with fresh chopped parsley, if desired.
Notes
This dish pairs wonderfully with roasted vegetables like broccoli or asparagus, or a simple side salad.