How Long to Cook Pork Ribs
Baby back ribs and spare ribs, full rack.
The Short Answer
In the oven at 275°F, pork ribs takes 180–240 minutes. The USDA-recommended safe internal temperature is 145°F, verified with an instant-read thermometer in the thickest part. Scroll down for all cooking methods, detailed instructions, and tips from the Professor.
Always verify with an instant-read thermometer inserted into the thickest part.
Cooking Methods
🔥 Oven
Temperature: 275°F
Time: 180–240 minutes
Rest: 10 minutes
Low and slow. Wrap in foil after 2 hours (the Texas crutch). Unwrap for the last 30 minutes and brush with sauce for caramelization.
🔥 Grill
Temperature: 250°F
Time: 180–300 minutes
Rest: 10 minutes
Indirect heat only. Keep the lid closed. Add wood chips for smoke flavor. Mop with sauce in the last 30 minutes.
🥘 Slow Cooker
Time: 360–480 minutes
On low for 6-8 hours. Cut rack in half to fit. Finish under the broiler for 3-5 minutes to caramelize the sauce.
⚡ Instant Pot / Pressure Cooker
Pressure: High
Time: 25–30 minutes
Release: Natural release 10 minutes
Baby back ribs: 25 minutes. Spare ribs: 30 minutes. Stand ribs on end curled around the pot. Finish under the broiler for 3-5 minutes with sauce for caramelized exterior.
The 3-2-1 method for spare ribs: 3 hours unwrapped at 250°F, 2 hours wrapped in foil with liquid, 1 hour unwrapped with sauce. Adjust to 2-2-1 for baby backs since they are smaller.
Frequently Asked Questions
The meat should pull back from the bones about 1/4 inch, the surface should have a dark bark, and a toothpick should slide into the meat with little resistance. Internal temp of 195-203°F for tender ribs.
Baby backs come from the upper back area near the spine. They are shorter, leaner, and cook faster. Spare ribs come from the belly area, are larger, fattier, and have more flavor.
The Bottom Line
Pork Ribs is straightforward to cook when you know the time and temperature. The most important number to remember is 145°F internal. An instant-read thermometer is the only reliable way to confirm doneness; color and firmness are not accurate indicators. Use the method that fits your equipment and schedule, and always let the food rest before cutting or serving. Resting allows juices to redistribute and carryover cooking to finish the job.
Source: USDA / Culinary reference | Last verified: March 19, 2026 | Our methodology