Instant Pot Porterhouse Steak Recipe: Medium-Rare Precision Without the Grill

Achieving medium-rare perfection with a porterhouse steak doesn’t require a grill or cast iron skillet. This method delivers consistent results using your Instant Pot, with a fraction of the effort and without sacrificing flavor or texture.

The secret lies in the precise combination of searing and pressure cooking. Searing the steak first creates a flavorful crust, while the pressure cooking locks in juices and brings the meat to the ideal internal temperature.

What emerges is a porterhouse with a beautifully browned exterior and a tender, juicy interior cooked to your preferred doneness. The Instant Pot’s controlled environment ensures even cooking throughout the thick cut.

Ready in under an hour, this technique proves that you can enjoy restaurant-quality steak at home with minimal cleanup and maximum satisfaction.

Ingredients for Instant Pot Porterhouse Steak

Two thick porterhouse steaks and a handful of pantry staples. That is all.

The steak is everything here. Porterhouse (with its T-bone separating strip and tenderloin) needs to be 1.5-2 inches thick—thinner cuts overcook. I grab mine from Whole Foods or a trusted local butcher; their beef is consistently well-marbled. Look for bright red color with creamy white fat. If you see grayish-brown meat, skip it. The bone-in adds flavor, so don’t trim it off.

No porterhouse? A bone-in ribeye works almost as well (same thickness). Out of garlic powder? Fresh minced garlic at half the amount. Beef broth can be swapped for water in a pinch, but you’ll lose depth. Vegetable broth changes the flavor profile—skip it. The Worcestershire is non-negotiable for that classic steakhouse taste, but soy sauce (1 tsp) gets you 80% there if you’re desperate.

Cook immediately or refrigerate steaks (unwrapped, on a rack) for up to 3 days. Let them sit at room temp 30-45 minutes before cooking. Leftovers? Rare for steak, but they’ll keep 4-5 days sliced thin for sandwiches. Freezing cooked steak? Not recommended—texture suffers.

Step-by-Step Instructions for Instant Pot Porterhouse Steak

Here’s the method. Straightforward, tested, works every time.

Step 1: Season the Porterhouse Steak

Pat the 2 lb Porterhouse Steak completely dry with paper towels—this ensures a perfect sear. I always use a thick, bone-in cut for this method. In a small bowl, combine the 2 tsp Kosher Salt, 1 tsp Black Pepper, 1 tsp Garlic Powder, 1 tsp Onion Powder, and 0.5 tsp Smoked Paprika.

Rub this seasoning mixture all over the steak, pressing it into the meat so it adheres well. You want every surface coated evenly. Let the seasoned steak sit at room temperature for 30 minutes while you prep the remaining ingredients—this takes the chill off for more even cooking.

Step 2: Sear the Steak in the Instant Pot

Set your Instant Pot to the Sauté function on Normal/Medium heat and add the 2 tbsp Olive Oil. Once the oil is shimmering and hot, carefully add the steak. Sear for 3-4 minutes per side until a deep, golden-brown crust forms.

You’ll know it’s ready to flip when it releases easily from the pot. Don’t move it around too much—let that beautiful crust develop. After searing both sides, add the 2 tbsp Unsalted Butter, 2 whole Fresh Rosemary Sprigs, and 2 whole Fresh Thyme Sprigs to the pot.

Step 3: Pressure Cook to Medium-Rare Perfection

Pour in the 0.5 cup Beef Broth and 1 tbsp Worcestershire Sauce, using a wooden spoon to scrape up any browned bits from the bottom of the pot. This deglazing step prevents burning and adds incredible flavor to your cooking liquid.

Secure the lid, set the valve to Sealing, and cook on High Pressure for 6 minutes. I know it seems short, but this timing, combined with the natural pressure release, delivers perfect medium-rare every time. Let the pressure release naturally for 10 minutes, then quick-release any remaining pressure.

Step 4: Rest and Slice the Porterhouse

Carefully remove the steak from the Instant Pot and transfer it to a cutting board. Tent loosely with foil and let it rest for 10 minutes—this allows the juices to redistribute throughout the meat. If you skip this step, you’ll lose all those valuable juices onto your cutting board.

Slice the steak against the grain, separating the tenderloin and strip portions. The steak should be a perfect medium-rare with a beautiful pink center. Serve immediately with the aromatic cooking liquid spooned over the top for extra flavor.

Pro Cooking Tips for This Recipe

Perfect Your Sear

Make sure your Instant Pot is fully preheated on Sauté (Normal) before adding the steak. I let my oil get nearly smoking—2 tbsp olive oil needs 3-4 minutes to reach the right temp. Only then do I add the meat. This ensures a deep, flavorful crust forms quickly.

Don’t Skip Deglazing

After searing, pour in ½ cup beef broth and use a wooden spoon to scrape up every browned bit. These fond particles pack immense flavor into your cooking liquid. I always add 1 tbsp Worcestershire sauce at this stage for extra umami depth.

Pressure Time Precision

For medium-rare, cook on High Pressure for 6 minutes exactly. The 1.5-2 inch thickness of porterhouse is ideal for this timing. Any thicker and you risk uneven doneness. I set a timer to avoid overcooking. 🌡️

Natural Release Matters

After pressure cooking, let the Instant Pot naturally release for 10 minutes. This continues cooking the steak gently. Quick-releasing immediately can cause the meat to seize up. I find this step gives the most tender, juicy results.

Rest Before Slicing

Transfer the steak to a cutting board and tent with foil. Let it rest for 10 minutes minimum—this lets juices redistribute. Slicing too soon means those precious juices end up on your board, not in your meat. 💡

Slice Against the Grain

The porterhouse has two distinct muscle sections. Slice the strip side perpendicular to its grain, then rotate your board to slice the tenderloin portion against its grain. This shortens muscle fibers for maximum tenderness. I use a sharp 10-inch chef’s knife for clean cuts.

Frequently Asked Questions