Prep the chicken: Pat the chicken dry with paper towels. If the breasts are thick, halve them horizontally to create even cutlets. This helps them cook evenly and stay tender.
Make the sauce: In a bowl, whisk Dijon, maple syrup, olive oil, garlic, apple cider vinegar, smoked paprika, thyme, salt, and pepper until smooth and glossy.
Marinate: Add chicken to the bowl or a zip-top bag, coat well, and let it sit for at least 20 minutes at room temperature, or up to 6 hours in the fridge.
The longer rest develops deeper flavor.
Preheat the oven: Heat to 400°F (205°C). Line a sheet pan with parchment or lightly oil a baking dish to prevent sticking.
Arrange and bake: Lay the chicken in a single layer and spoon extra sauce over the top. Bake for 16–22 minutes, depending on thickness, until the internal temperature reaches 165°F (74°C).
Optional skillet finish: For extra caramelization, transfer the chicken and sauce to a hot skillet for 1–2 minutes per side.
The sugars will gloss without burning if you keep the heat medium.
Rest and serve: Let the chicken rest for 5 minutes. Spoon the pan sauce over the top and garnish with chopped parsley.
Suggested sides: Serve with roasted broccoli, green beans, or asparagus; quinoa or brown rice; or a crisp salad with lemon vinaigrette.