- 3 lb (1.4 kg) St. Louis–cut spare ribs (about 2 racks) - 2 tbsp (30 ml) yellow mustard (as binder) - 1/4 cup (50 g) brown sugar, packed - 1/4 cup (30 g) paprika - 2 tbsp (30 g) kosher salt - 1 tbsp (15 g) black pepper, coarsely ground - 1 tbsp (15 g) garlic powder - 1 tbsp (15 g) onion powder - 1 tsp (5 g) cayenne pepper - 1 tsp (5 g) dry mustard powder - Hickory or oak wood for smoking
1. Remove membrane from ribs and pat dry. Spread a thin layer of yellow mustard over both racks to help the rub adhere. Combine brown sugar, paprika, salt, black pepper, garlic powder, onion powder, cayenne, and dry mustard; rub generously over ribs. 2. Preheat smoker to 225°F (107°C) using hickory or oak wood. Place ribs bone-side down and smoke 4–5 hours, spritzing with apple juice or apple cider vinegar every hour after the first hour to maintain moisture. 3. Check for tenderness; ribs are done when a probe slides in with little resistance or meat pulls back from the bone ends about 1/4 inch. Rest 10 minutes, slice between bones, and serve without sauce to enjoy the dry-rub flavor.
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