Mastering porterhouse on the grill is about precision, not luck. This method delivers a steakhouse-quality crust with deep char marks and a perfectly tender interior every time.
I rely on high heat and a simple but effective dry rub to enhance the beef’s natural flavor. The key is letting the steak rest at room temperature before grilling, ensuring even cooking throughout.
The result is a thick, juicy cut with a bold sear that locks in flavor. Serve it sliced against the grain to showcase the beautiful marbling of the porterhouse.
This technique works for any thick-cut steak when you need restaurant-level results at home.
Ingredients for Bobby Flay Grilled Porterhouse Steak
Steakhouse-quality ingredients for a bold, charred crust and tender interior.
| Ingredient | Amount | Notes |
|---|---|---|
| Porterhouse Steak 🥩 | 2 ½ lb | Bone-in, 1.5-2 inches thick |
| Kosher Salt 🧂 | 2 tbsp | Diamond Crystal preferred |
| Coarsely Ground Black Pepper 🌶️ | 1 tbsp | Freshly cracked for best texture |
| Smoked Paprika 🌶️ | 1 tsp | Spanish variety recommended |
| Garlic Powder 🧄 | 1 tsp | Not garlic salt |
| Onion Powder 🧅 | 1 tsp | Fine grind for even distribution |
| Dried Thyme 🌿 | ½ tsp | Rubbed between fingers to release oils |
| Extra-Virgin Olive Oil 🫒 | 2 tbsp | For high-heat searing |
| Unsalted Butter 🧈 | 2 tbsp | For basting while grilling |
| Fresh Rosemary Sprigs 🌿 | 2 whole | For aromatic basting |
| Fresh Thyme Sprigs 🌿 | 4 whole | For aromatic basting |
| Garlic Cloves 🧄 | 4 cloves | Smashed, peeled for basting |
[recipe_ingredient_scaler]
The steak is non-negotiable—USDA Prime porterhouse from a reputable butcher like Pat LaFrieda or Snake River Farms ensures superior marbling. Look for a bright red color with generous fat streaking (the marbling). Bone-in cuts provide more flavor and a dramatic presentation. Weigh each steak to confirm thickness; 1.5 to 2 inches is ideal for achieving that perfect medium-rare center with a deep crust.
No porterhouse? Ribeye or T-bone work well with the same technique. For the dry rub, freshly ground spices make a difference—grind black peppercorns and toast whole cumin seeds if possible. If avoiding dairy, ghee or avocado oil can replace butter for basting. The olive oil should have a high smoke point; light olive oil or grapeseed oil are suitable alternatives.
Let the seasoned steak rest at room temperature for 45-60 minutes before grilling. Store raw steak in the coldest part of the refrigerator for up to 3 days. Leftover cooked steak keeps for 4 days but is best enjoyed immediately for peak texture.
Why You’ll Love This Recipe
- 5-Minute Seasoning: Honestly, it’s just salt, pepper, smoked paprika, and garlic powder—rub it on and you’re done.
- Smoky, Garlicky Bite: That smoked paprika and garlic powder crust gives every bite a deep, crave-worthy kick.
- Feeds a Crowd: One porterhouse, two steaks in one—perfect for date night or a small gathering.
- Next-Day Luxury: Leftovers make unreal sandwiches or salads, so I always cook an extra thick cut.
Step-by-Step Instructions for Grilled Porterhouse Steak
Master the technique for a perfectly charred exterior and juicy interior with these proven steps.
Step 1: Season the Porterhouse Generously
Pat the 2.5 lb Porterhouse Steak completely dry with paper towels—this ensures a proper sear. In a small bowl, combine the 2 tbsp Kosher Salt, 1 tbsp Coarsely Ground Black Pepper, 1 tsp Smoked Paprika, 1 tsp Garlic Powder, 1 tsp Onion Powder, and 0.5 tsp Dried Thyme.
Rub the spice blend evenly over all surfaces of the steak, pressing firmly to adhere. The thick cut of this bone-in steak allows for a bold crust while maintaining a tender center. Let it sit at room temperature for 30-45 minutes to take the chill off before grilling.
Step 2: Preheat and Prepare the Grill
Preheat your grill to high heat (about 450-500°F). Clean the grates thoroughly with a brush to prevent sticking. This high temperature is crucial for achieving that signature char and crust on the steak’s exterior.
While the grill heats, prepare your basting ingredients: place the 2 tbsp Unsalted Butter in a small heatproof bowl and gather the 2 whole Fresh Rosemary Sprigs, 4 whole Fresh Thyme Sprigs, and 4 cloves Garlic Cloves (smashed and peeled) nearby for easy access during cooking.
Step 3: Sear and Baste the Steak
Brush the steak lightly with the 2 tbsp Extra-Virgin Olive Oil just before placing it on the grill. Sear the steak over direct heat for 4-5 minutes per side to develop a deep, rich crust. Avoid moving the steak during this initial sear to maximize contact with the grates.
After flipping, add the butter, fresh herb sprigs, and garlic cloves to the grill near the steak. As the butter melts, use a spoon to baste the steak continuously with the aromatic butter for the remaining 2-3 minutes of cooking
Step 4: Check for Doneness and Rest
For medium-rare (recommended for porterhouse), the steak should reach an internal temperature of 130-135°F. Use an instant-read thermometer inserted into the thickest part of the meat, avoiding the bone. The steak will continue cooking as it rests, so remove it when it’s 5°F below your desired final temperature.
Transfer the steak to a cutting board and let it rest for 10-15 minutes under a loose tent of foil. This allows the juices to redistribute throughout the meat, ensuring every bite is moist and flavorful. The bone helps insulate the meat, so the resting period is particularly important for this cut.
Pro Tips For Making Bobby Flay Grilled Porterhouse Steak
- Dry the Steak: Pat the porterhouse completely dry with paper towels before seasoning—any moisture will steam the surface instead of searing it, and you’ll lose that crust Bobby Flay is known for.
- Salt Generously: Use more kosher salt than feels right, at least 1 teaspoon per side for a 1.5-inch steak. I learned this the hard way after my first few attempts came out under-seasoned.
- Let It Rest: After grilling, tent the steak loosely with foil and give it a solid 10 minutes to rest. Skipping this means all those juices will end up on your cutting board instead of in the meat.
- Preheat the Grill: Crank the grill to high and let it heat for at least 10-15 minutes before the steak hits the grates. Sounds obvious, but I’ve ruined steaks by rushing this step—no crust, just disappointment.
Make-Ahead Tips for bobby flay grilled porterhouse steak
Dry Rub Prep
Mix your dry rub the night before—combine the 2 tbsp Kosher Salt, 1 tbsp Coarsely Ground Black Pepper, and other spices in a small bowl. Store in an airtight container at room temperature. This gives the flavors time to meld together beautifully. 💡
Steak Seasoning
Season the 2.5 lb Porterhouse Steak up to 12 hours before grilling. Apply the dry rub, wrap it loosely in plastic, and refrigerate. Take it out 45-60 minutes before cooking to bring it to room temperature for even doneness.
Grill Setup
Prep your grill tools in advance—clean grates, long-handled tongs, and a meat thermometer. If using charcoal, light the chimney 30 minutes before cooking. A hot, clean grill is essential for that perfect sear on this thick cut.
Basting Station
Prepare your basting ingredients early: melt the 2 tbsp Unsalted Butter and have the rosemary, thyme, and garlic cloves ready. Keep them near the grill in a heatproof dish for easy access during searing.
Resting Area
Set up a warming area with a cutting board and foil tent. After grilling, the steak needs 10-15 minutes to rest. This lets the juices redistribute, ensuring a tender, flavorful bite every time.
Leftovers Plan
Slice and store any leftovers in airtight containers in the fridge for up to 4 days. Reheat gently in a skillet with a pat of butter to maintain moisture. Honestly, it makes great steak sandwiches the next day! 🔥
Nutrition Facts
Frequently Asked Questions
What’s the best way to check doneness without cutting?
Use an instant-read thermometer inserted into the thickest part. For medium-rare, aim for 130-135°F. The steak will rise 5°F while resting, so pull it off the grill early.
Can I use a gas grill instead of charcoal?
Preheat your gas grill to 450-500°F for the same searing effect. Just ensure the grates are clean and well-oiled to prevent sticking.
How long should I let the steak rest after grilling?
Rest the porterhouse for 10-15 minutes under foil. This lets juices redistribute, ensuring a tender, juicy result. Skipping this step can make the meat dry.
Trained in classic French technique but raised on slow-cooked ribs and spicy rubs, she blends culinary skill with smoke and soul.
- Recipe for Boneless Pork Chops in Cast Iron Skillet: Sear and Baste to Juicy Perfection - October 3, 2026
- Recipe for Boneless Cross Rib Roast: Slow-Roasted Beef with Herb Crust - October 3, 2026
- Hamburgers in Sauce Recipe Crock Pot: Slow-Cooked Savory Delight - October 3, 2026