PORTERHOUSE RECIPE RECIPES

Steps:

• Prepare a medium-size bowl of ice water. In the bowl of an electric stand mixer fitted with the whisk attachment, gradually whip the cream and sour cream together. Increase the speed of the mixer and continue whipping until the cream separates and the mixture thickens. 
• Use a rubber spatula to gather up the butter and remove it from the bowl. There will be some liquid that is a natural result of this process. That liquid is actually buttermilk. Gather the ball of butter together into a double layer of cheesecloth or a thin kitchen towel and plunge it into the ice bath to wash any buttermilk off the surface. Sprinkle with salt and pepper, to taste. Pack the butter into a bowl or roll it into a ball or log shape using plastic wrap. Use immediately or store in the refrigerator.

Steps:

• Place a 10-to-12-inch cast-iron skillet in the oven and heat the oven to 500 degrees F. Bring the steak to room temperature.
• When the oven reaches temperature, remove the skillet and place on the range over high heat for 5 minutes. Coat the steak lightly with oil and sprinkle both sides with a generous pinch of salt. Grind on black pepper.
• Immediately place the steak in the middle of the hot, dry skillet. Cook 30 seconds without moving. Turn with tongs and cook another 30 seconds, then put the pan straight into the oven for 2 minutes. Flip the steak and cook for another 2 minutes. (This time is for medium-rare steak. If you prefer medium, add a minute to both of the oven turns.)
• Remove the steak from the skillet, cover loosely with foil and rest for 2 minutes. Serve whole or slice thin and fan onto plate.