Gather all the ingredients.
Preparing the Garlic & Herb Butter: Finely chop 1 tablespoon each of thyme, oregano, and Italian parsley. Mince 2 tablespoons of garlic. Set aside.
Make the Butter: Use a skillet or microwave to soften the butter. In a small bowl, combine the softened 2 sticks of butter, minced garlic, and chopped herbs. Mix well until everything is evenly distributed. You can form the butter into a log, wrap it in plastic wrap, and refrigerate for at least 10 minutes until you're ready to use it.
Preheat Your Oven: Set your oven to 225°F. This low temperature will ensure a gentle and even cook for your steak.
Preparing the Tomahawk Steak: Pat the tomahawk steak dry with paper towels. Season generously with oil, salt, and pepper on both sides.
Reverse Sear Method: Place the steak on a wire rack set over a baking sheet. Roast in the preheated oven until the internal temperature reaches 120°F (49°C) for medium-rare, which should take about 45-60 minutes.
Prepare for Searing: Once the steak has reached the desired temperature, remove it from the oven and let it rest for a few minutes. This resting period is crucial to allow the juices to redistribute.
Sear the Steak:Heat a cast-iron skillet over high heat. Add oil with a high smoke point, such as avocado or grapeseed oil. When the skillet is smoking hot, sear the steak for 1-2 minutes on each side (including the edges) until a beautiful crust forms.
Top with Garlic & Herb Butter: Once the steak is seared to perfection, immediately top it with generous slices of your garlic herb butter before removing it from the cast iron pan. The heat from the steak and pan will melt the butter, creating a sauce. Then place the steak on a cutting board.
Slice and Serve: Let the steak rest for a few minutes to allow the butter to melt and the juices to settle. Slice the steak against the grain and serve with your favorite sides.