Pat the chicken breasts dry. Season both sides with 1/2 teaspoon salt, 1/2 teaspoon pepper, and 1/4 teaspoon garlic powder.
Place the flour in a shallow dish and lightly coat each chicken piece on both sides with the flour.
Heat a large skillet over medium heat and add 1 tablespoon olive oil.
When the oil is hot, add the chicken in a single layer without crowding the pan; cook 2–3 minutes per side until well seared. Cook in batches if necessary. Remove the cooked chicken to a plate and keep warm.
After all chicken is cooked and removed, pour 1/2 cup chicken broth into the skillet to deglaze, scraping up any browned bits.
Add 2 tablespoons Dijon mustard and 1 tablespoon honey to the broth, then slowly stir in 1 cup heavy cream until the sauce is smooth and combined. Taste and season with up to 1/2 teaspoon additional salt if needed.
Return the chicken and any accumulated juices to the skillet. Simmer gently until the chicken reaches 165°F (74°C) internal temperature and the sauce is slightly thickened.
Serve the chicken warm with sauce spooned over top.