A rack of boneless pork spare ribs that weigh 3 ½ to 4 pounds need to be baked 1 ½ to 2 hours at 350 degrees Fahrenheit. The internal temperature should be 145 degrees after a three-minute rest.
The key to baking boneless pork spare ribs is to bring the internal temperature to 145 degrees Fahrenheit after a three-minute rest. The National Pork Board recommends baking the ribs at 350 degrees Fahrenheit in a shallow, uncovered pan. The Board also suggests checking the internal temperature with a meat thermometer. The ribs can be rubbed in a spice mixture before baking. Sauces generally get brushed on during the last 15 to 20 minutes of cooking.