Ingredients

• 4 teaspoons kosher salt
• 1 tablespoon freshly ground black pepper
• 1 teaspoon freshly ground white pepper
• 1 teaspoon cayenne pepper
• 0.5 teaspoons garlic powder
• 2 tablespoons white vinegar
• 2 teaspoons Dijon mustard
• 1 rack St. Louis-style pork spare ribs

Instructions

1. 1 Mix salt, black pepper, white pepper, cayenne, and garlic powder together in a small bowl. Set spice rub aside.
2. 2 Stir vinegar and Dijon mustard together in a small bowl.
3. 3 Place ribs on a foil-lined baking sheet. Turn the ribs over so that the meat side is down. Use the tip of a small, sharp knife to make some very shallow slashes every few inches through the membrane that covers the ribs. Poke the knife 3 or 4 times between each rib bone, about 1/4 inch deep.
4. 4 Brush about 1/2 of the Dijon mustard mixture on top. Sprinkle with about 40% of the spice rub. Turn the rack over and brush on the rest of the mustard and vinegar mixture. Sprinkle on the rest of the rub, reserving 1 or 2 teaspoons in case you want to use it to season the cooked ribs later.
5. 5 Refrigerate the ribs, uncovered, 4 to 12 hours before baking.
6. 6 Preheat the oven to 300 degrees F (150 degrees C). Remove ribs from the refrigerator.
7. 7 Cook in the center of the preheated oven for 1 1/2 hours. Remove from the oven and baste with the pan drippings. Continue to cook until very tender and the tip of a knife slides in very easily, about 1 1/2 hours more.
8. 8 Remove from the oven, baste again, and let ribs rest for 15 minutes before cutting and serving.

Nutrition per serving