Pat pork chops dry, then season all over with salt and pepper.
Heat olive oil in a skillet over medium-high. Sear chops 2–3 minutes per side until lightly browned.
Spread sliced onion in the slow cooker. Nestle seared chops on top.
Whisk maple syrup, Dijon, broth, vinegar, soy sauce, garlic, thyme, and rosemary. Pour over the chops.
Cover and cook on LOW 5–6 hours or HIGH 2.5–3 hours, until tender but not falling apart.
Transfer chops to a plate. Turn cooker to HIGH. Stir cornstarch with water, then whisk slurry into the sauce.
Cook 5–10 minutes until the sauce thickens and turns glossy. Stir in butter, then taste and adjust seasoning.
Return chops to warm briefly or plate and spoon sauce over top to serve.
Notes
Variation: Add 1 tbsp whole-grain mustard or a pinch of red pepper flakes for extra bite. Try layering thin apple slices under the chops for a subtle apple-maple note.Serve with mashed potatoes, buttered egg noodles, or steamed green beans. Leftovers keep 3–4 days refrigerated; reheat gently with a splash of broth. Sauce freezes well up to 2 months.This recipe is an original creation inspired by classic Maple Dijon Pork Chops in the Slow Cooker flavors. All ingredient ratios and instructions are independently developed.