Season the steak generously on all sides with salt and pepper.
Heat a cast-iron skillet over medium-high heat, then melt the fat in the pan.
When the hot, sear the steak for 3 minutes on each side.
Place the skillet in the oven to cook the steak to your desired doneness, using a meat thermometer to determine the internal temperature (see chart below).
Remove the skillet from the heat and allow the steak to rest for 10 minutes before slicing and serving.
While the steak is resting, make the blue cheese whip: Place the cream in a stand mixer and mix until stiff peaks form.
Stir in the blue cheese and salt until well blended.
Serve each portion of steak with 2 tablespoons of the blue cheese whip.
Note
The whip can be made ahead and stored in an airtight container in the refrigerator for up to 3 days.