Place ribs, meaty-side up, in a large roasting pan. Sprinkle ribs with salt and pepper.
Bake at 475° for 30 minutes. Meanwhile, combine ketchup and next 4 ingredients in a small bowl.
Arrange ribs in a 6-qt. slow cooker, adding sauce on each layer of ribs. Depending on the shape of your slow cooker—oval or round—you may have to cut each rib rack into thirds instead of in half. Cover and cook ribs on LOW 9 hours. Remove ribs from slow cooker; cover to keep warm.
Pour drippings and sauce from slow cooker into a saucepan. (Skim a few ice cubes across the surface of sauce to remove fat, if desired, and discard.) Bring sauce to a boil; reduce heat, and simmer over medium heat 20 minutes or until sauce thickens. (Sauce will reduce by about half.) Brush sauce over ribs before serving.
Make Ahead: These ribs can hold for several hours after finishing in the slow cooker. Place sauced-up ribs on a rimmed baking sheet; cover tightly with foil. Place in a preheated 190° oven to keep warm.
This recipe produced in aces! The meat did indeed simply fall off the bone and the taste was yummy. My husband is a rib fan and he often has them out at restaurants. I have not had much success cooking them at home in the past so haven't attempted them in years; but when I saw this recipe I thought it was worth trying. I'm glad I did.
This recipe produced delicious, slightly caramelized ribs. I will be using this technique when I make ribs from now on. If you do not like horseradish, I would suggest using less or eliminating the horseradish.
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