How Long To Cook Roast In Instant Pot

ByLily

The Instant Pot brings roast dinners within reach on busy weeknights, but only if you nail the cook time. If you are wondering how long to cook roast in instant pot, the short answer is 60 to 80 minutes under high pressure for a 3 to 4 pound beef roast, plus about 15 minutes of natural release. Get that window right and you will have tender, sliceable meat every time.

This guide breaks down exact times by roast type and size, plus the steps that actually matter. Read on so your next pot roast comes out perfect, not chewy.

How Long To Cook Roast In Instant Pot

Cook time depends on three things: the type of roast, its weight, and whether you cut it into chunks. Here is the quick reference most people need.

  • Beef chuck roast, 3 pounds: 60 minutes high pressure
  • Beef chuck roast, 4 pounds: 75 minutes high pressure
  • Beef chuck roast, 5 pounds: 90 minutes high pressure
  • Bottom round or rump roast: add 10 to 15 minutes over chuck
  • Pork shoulder or butt, 3 to 4 pounds: 60 to 75 minutes
  • Frozen beef roast, 3 pounds: 90 minutes

Always add 15 minutes of natural release after the timer beeps. Quick releasing a roast can toughen the meat and dry it out.

Why The Cut Of Meat Changes Everything

Not all roasts behave the same under pressure. Chuck, brisket, and pork shoulder are full of connective tissue. They need long cook times to break down into soft, shreddable meat.

Lean cuts like sirloin tip or eye of round have less fat and collagen. They can turn dry fast, so keep them closer to the lower end of the time range and slice them thin.

How Long To Cook Roast In Instant Pot Per Pound

A simple rule helps when your roast does not match the chart above.

  • Chuck roast: about 20 minutes per pound
  • Pork shoulder: about 20 minutes per pound
  • Lean roasts: about 15 minutes per pound

Round up to the nearest 5 minutes. Under-cooking is easy to fix, but overcooked roast turns to mush.

Step By Step: Cooking A Pot Roast Under Pressure

Follow these steps in order and you will get consistent results.

  1. Pat the roast dry with paper towels and season both sides with salt and pepper.
  2. Set the Instant Pot to Saute and add 2 tablespoons of oil.
  3. Sear the roast 3 to 4 minutes per side until browned. This builds flavor.
  4. Remove the roast and set it aside.
  5. Add 1 cup of beef broth and scrape up any browned bits on the bottom.
  6. Place a trivet in the pot and set the roast on top.
  7. Add onions, carrots, and potatoes around the meat if you like.
  8. Lock the lid and set the valve to Sealing.
  9. Cook on High Pressure for the time listed in the chart above.
  10. Let the pressure release naturally for 15 minutes, then turn the valve to Venting.
  11. Check the meat with a fork. It should twist easily with little resistance.

Do You Need A Trivet Or Not

A trivet keeps the roast out of the liquid so it steams rather than boils. That gives you better texture and less mess.

If you want a one-pot meal with gravy, skip the trivet and let the meat sit partly in the broth. The liquid turns into a rich sauce you can thicken with cornstarch.

Natural Release Vs Quick Release

Natural release is not optional for roast. During those 15 minutes, the meat keeps cooking gently and the fibers relax.

Quick release drops the pressure fast, which can make the roast tough and dry. If you are short on time, wait at least 10 minutes before releasing the rest of the steam.

Common Mistakes That Ruin Instant Pot Roast

Most failed roasts come down to a handful of fixable errors.

  • Using too little liquid. You need at least 1 cup to build pressure safely.
  • Skipping the sear. It adds deep flavor in just a few minutes.
  • Cutting the cook time short because you are hungry. Tough meat means it needed more time, not less.
  • Forgetting to account for the come-up time. A 4 pound roast can take 15 minutes just to reach pressure.
  • Adding dairy before cooking. It can curdle under high heat.

How To Fix An Undercooked Roast

If the meat resists your fork, put the lid back on and cook for 10 more minutes on High Pressure. Then do another 10 minute natural release.

Repeat in 10 minute blocks until it shreds. Chuck roast is very forgiving, so a little extra time rarely hurts.

How To Fix An Overcooked Roast

If the roast falls apart into shreds, do not panic. Shred it fully and mix it with the cooking liquid and vegetables.

Serve it over mashed potatoes, rice, or crusty bread. It works great as a sandwich filling too.

Best Roasts For The Instant Pot

Pick the right cut and the cooking time almost takes care of itself.

  • Beef chuck roast: the best all-around choice for pot roast
  • Beef brisket: great flavor, needs the full 90 minutes
  • Pork shoulder: perfect for pulled pork style meals
  • Lamb shoulder: 60 to 70 minutes for a 3 pound roast
  • Venison roast: lean, so keep it near 15 minutes per pound

Lean cuts like eye of round work, but they slice better than they shred. Save those for sandwiches and keep the time on the lower side.

Tips For A Better Roast Every Time

Small habits make a big difference in the final result.

  • Let the roast rest 10 minutes after releasing pressure before slicing.
  • Season the meat a few hours ahead if you can. The salt works its way in.
  • Brown the meat in batches if your pot is crowded.
  • Add hardy vegetables like carrots and potatoes from the start. Add soft ones like peas at the end.
  • Thicken the juices with a cornstarch slurry on Saute mode for gravy.

The main takeaway is simple. For a 3 to 4 pound chuck roast, plan on 60 to 80 minutes at high pressure plus 15 minutes of natural release. Adjust up for larger or leaner cuts, and always let the pressure come down on its own. With those numbers in hand, weeknight roast dinners become a regular thing instead of a weekend project.

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