Here’s a clear, step‑by‑step guide on how to cook corned beef in an Instant Pot , plus some storytelling flair and quick tips for perfectly tender meat and veggies.

Quick Scoop

You can cook corned beef in the Instant Pot by pressure cooking it on high for about 75–90 minutes (depending on size), then letting the pressure naturally release for 15–20 minutes before slicing. Most people cook the vegetables (potatoes, carrots, cabbage) afterwards in the flavorful cooking liquid for just a few minutes on high pressure.

Basic Instant Pot Corned Beef (3–4 lb brisket)

Imagine it’s St. Patrick’s Day evening, you’re late, and the traditional stovetop simmering would take all afternoon—this is exactly where the Instant Pot shines.

Ingredients (base version)

  • 1 corned beef brisket (about 3–4 lb), with seasoning packet
  • 1–2 cups beef broth or water
  • 1 can beer (optional, for extra flavor)
  • 1 onion, quartered (optional)
  • 3–4 cloves garlic, smashed (optional)
  • Extra spices if you like: peppercorns, bay leaf, mustard seeds, etc.

Step‑by‑step instructions

  1. Prepare the pot
    • Place the metal trivet or rack in the Instant Pot.
    • Add liquid: about 2–3 cups total (beer + broth or water).
    • Optional but tasty: add onion and garlic to the liquid.
  2. Season and load the beef
    • Remove the corned beef from the package; rinse if you want to reduce saltiness.
    • Place it fat side up on the trivet.
    • Sprinkle the seasoning packet over the top.
  3. Pressure cook the corned beef
    • Seal the lid and set the valve to Sealing.
    • Use Pressure Cook/Manual, High pressure :
      • About 75–85 minutes for a ~3 lb brisket.
      • Around 85–90 minutes for 3.5–4+ lb or if you like it very tender.
    • When the time is up, let it do a natural release for 15–20 minutes.
    • Then carefully switch the valve to Venting to release remaining pressure.
  4. Rest and slice
    • Take the corned beef out and place it on a cutting board.
    • Tent loosely with foil and rest for about 10–15 minutes.
    • Slice against the grain for maximum tenderness.

Adding Potatoes, Carrots, and Cabbage

Think of this as a two‑act story: first, the meat gets its long, slow (but fast) Instant Pot “spa day,” then the veggies have a quick cameo in the same flavorful broth.

What you’ll need

  • 4–6 small potatoes (Yukon Gold or red), halved if large
  • 3–4 carrots, cut into chunks
  • 1 small head cabbage, cut into wedges

Quick veggie finish (after the meat is done)

  1. Use the same liquid
    • Leave the cooking liquid in the pot after you remove the meat.
    • If you want, skim some fat from the top.
  2. Add the vegetables
    • Add potatoes and carrots first (they’re denser).
    • Place cabbage wedges on top (don’t go above the max fill line).
  3. Pressure cook the vegetables
    • Seal the lid again, set to High pressure :
      • About 3–5 minutes for fork‑tender veggies (3 for crisper, 5 for softer).
    • Quick release the pressure when the time is up.
    • Season with salt and pepper to taste just before serving.

Timing Guide (by size)

Here’s a simple way to think about it:

  • 2–3 lb brisket: 70–80 minutes on high, 15–20 min natural release.
  • 3–4 lb brisket: 80–90 minutes on high, 15–20 min natural release.
  • Vegetables: 3–5 minutes on high, quick release.

If you slice it and it seems a little tough, it usually means it either needed a bit more time or it’s being sliced with, not against, the grain. Resting helps too.

Flavor Twists (Optional but Fun)

To make this feel more like “your” recipe, you can play with the liquid and aromatics:

  • Use all beer instead of broth for a deeper flavor.
  • Add brown sugar or a spoon of mustard to the cooking liquid for a lightly sweet, tangy note.
  • Toss in extra pickling spices (peppercorns, mustard seeds, coriander seeds, bay leaf) if your packet seems small.
  • For a slightly less salty result, you can rinse the brisket first, or even soak it in water for 20–30 minutes before cooking.

Example: One‑Pot St. Patrick’s Day Dinner

Here’s a “put it all together” narrative you could follow:

  1. Start the Instant Pot with beer + broth, onion, garlic, and spices.
  2. Nestle the corned beef on the trivet, seasoning packet on top.
  3. Cook 85 minutes on high, 20 minutes natural release.
  4. Rest the meat under foil while the veggies cook in that same golden liquid for 4 minutes.
  5. Slice the corned beef against the grain, surround it with potatoes, carrots, and cabbage, spoon some of the broth over everything.

A little mustard or horseradish on the side, and you’ve got a classic, done in a fraction of the usual time. TL;DR: Put corned beef on the trivet in your Instant Pot with 2–3 cups liquid (broth/beer), cook on high for about 75–90 minutes depending on size, let it naturally release for 15–20 minutes, rest and slice against the grain, then cook potatoes, carrots, and cabbage in the leftover liquid for 3–5 minutes on high.