Start by seasoning the chicken breasts with salt, pepper, and garlic powder. This simple step enhances the chicken's flavor.
Lightly dredge each piece of chicken in flour, shaking off any excess. This will help create a lovely crust when cooked.
In a large skillet, heat the olive oil and 1 tablespoon of butter over medium heat. Once the butter is melted and bubbly, add the chicken to the skillet.
Cook the chicken for about 5-7 minutes on each side, or until golden brown and cooked through. Remove the chicken from the skillet and set aside.
In the same skillet, add the chicken broth, grainy mustard, Dijon mustard, and honey. Whisk everything together, scraping up any delicious brown bits from the bottom of the pan.
To thicken the sauce, add the remaining tablespoon of flour and whisk until smooth. Let it simmer for about 3-4 minutes until it thickens slightly.
Return the chicken to the skillet, coating it well with the sauce. Allow it to heat through for another minute. Once plated, sprinkle with fresh chopped parsley if desired.