Remove the membrane on the back of the ribs and trim any excess fat. Season the ribs with salt and pepper.
Mix the BBQ sauce, ketchup, brown sugar, apple cider vinegar, Worcestershire sauce, Dijon mustard, smoked paprika, garlic powder, onion powder, salt, and black pepper in a bowl. Whisk until well combined.
Pour a layer of sauce on the bottom of the crockpot. Add the ribs and coat them with the remaining sauce. If the sauce is too thick, add 1/4 cup of water to thin it out.
Cover the crockpot and cook the ribs on low for 6-8 hours or on high for 3-4 hours. The cooking time may vary depending on the type of ribs and the size of your crockpot. Make sure the ribs are fully cooked and tender before serving.
Once the ribs have finished cooking in the crockpot, you can place them on a baking sheet and broil them in the oven for three to five minutes to make them crispier and caramelize the sauce. Watch them closely to prevent burning.
Once the ribs are cooked, remove them from the crockpot and let them rest for a few minutes before slicing them. Serve them with extra sauce and your favorite sides, like coleslaw, baked beans, or mashed potatoes.