Instructions

1. Allow the standing rib roast to sit out at room temperature for 1 hour.
2. Preheat oven to 375º F.
3. In a small bowl mix together salt, garlic powder and black pepper and generously season the standing rib roast with this seasoning.
4. Place the rib roast on top of a broiling pan, fat side up and cook for 1 hour.
5. After 1 hour, turn off the oven and allow the roast to sit in the oven undisturbed for an additional 3 hours.

NOTE DO NOT OPEN THE OVEN AT ALL FOR THE ENTIRE 3 HOURS, it will continue to slowly cook in the hot oven.

1. After the 3 hours is up, turn the oven back on and cook until internal temperature reaches 125ºF, about 45 minutes.
2. Remove from oven, tent with foil, and allow to rest for 15 minutes. The roast will continue to cook and rise and additional 15ºF.
3. While the roast is resting, stir together the sour cream, horseradish, and salt.
4. Cut standing rib roast between ribs and serve with horseradish sauce.