Pat the chicken breasts dry with paper towels. Pound them to an even thickness if needed.
Season both sides with garlic powder, onion powder, paprika, thyme, salt, and black pepper.
In a small bowl, whisk together the Dijon mustard, honey, whole grain mustard, chicken broth, and lemon juice.
Heat the olive oil in a large skillet over medium-high heat.
Cook the chicken breasts for 5 to 6 minutes per side, until golden brown.
Reduce the heat to medium. Add the butter and minced garlic, cooking for 30 seconds until fragrant.
Pour the honey mustard mixture into the skillet and stir gently.
Spoon the sauce over the chicken as it simmers for 3 to 4 minutes, allowing the sauce to thicken slightly.
Cook until the chicken reaches an internal temperature of 165°F (74°C).
Remove the chicken from the skillet and let it rest for 5 minutes.
Garnish with fresh parsley and spoon the remaining honey mustard sauce over the chicken before serving.