Season the pork chops: Pat the chops dry. Season both sides with salt, pepper, and the onion powder.
Sear the chops: Heat the oil in a large skillet over medium-high heat. Add the pork chops and sear 3–4 minutes per side until nicely browned.
Transfer to a plate; they’ll finish cooking in the sauce.
Sauté the mushrooms: Lower heat to medium. Add butter, then mushrooms. Cook 5–6 minutes, stirring occasionally, until they release moisture and turn golden.
Add aromatics: Stir in the garlic and thyme.
Cook 30–60 seconds until fragrant, being careful not to burn the garlic.
Build the sauce: Pour in the chicken broth and scrape up browned bits. Stir in heavy cream and Dijon. Bring to a gentle simmer.
Return the chops: Nestle the pork chops back into the skillet.
Simmer 5–7 minutes, turning once, until the chops are just cooked through (internal temp about 145°F/63°C).
Adjust and finish: Taste and season with more salt and pepper if needed. If the sauce is too thick, add a splash of broth; if too thin, simmer another minute. Garnish with parsley.
Rest and serve: Let the chops rest a couple of minutes in the pan off heat.
Serve with sauce spooned over the top.