Using a very sharp knife, cut slits in the outer surface layer of fat, spaced 1 inch apart, in cross pattern, much like crossing on a baked ham. Do not cut into the meat.
5 Pound Standing Rib Roast
Gently slice down through the meat, following the bones to remove them from the meat. Discard the ribs.
Rub 2 heaping tablespoons of Kosher salt over entire roast and especially rub it into the slits.
2 Heaping Tablespoons of Kosher Salt
Place the meat onto a plate. Refrigerate the meat, uncovered, at least 24 hours and up to 96 hours.
Place the meat on the counter to rest for 2-3 hours so it takes the chill off. At the same time, set out the butter to soften.
Heat the instant pot on "more saute" and add a small drizzle of oil. Brown each side of the meat. Remove the meat and turn off the pot.
Place the broth in instant pot.
1 Cup Beef Broth
Place a trivet in the pot.
Season the meat with pepper.
1 1/2 teaspoons Black Pepper
Mix the butter and garlic in a bowl, and rub it all over the meat. Carefully lower the meat onto the trivet.
4-6 Cloves Garlic, 4 Tablespoons Butter
Place the lid on the instant pot and cook at high pressure for 8 minutes.
Leave the lid on and don't touch the pressure valve for 35 minutes. The IP will switch over to warming mode and the meat will continue to cook to 130-135 degrees.
Remove roast from the instant pot and heat a skillet to medium high heat with a little oil. Brown each side of the roast. You can also place under a broiler in the oven if you want to brown it that way. Reserve drippings and place the meat under a little foil on a cutting board. Go to the gravy steps.
Slice meat into 3/4-inch-thick slices. Season with coarse salt to taste along with any drippings turned to gravy, and serve.
For the Gravy
Pour the liquid from the browning out through a strainer into a bowl and set aside.
With the pot on the sauté setting, add 3 tablespoons of flour to the drippingsleft in the Instant Pot. Continue to cook the roux mixture for two minutes, whisking as it cooks.
Gradually add the strained liquids to the roux and continue cooking until the gravy is smooth and thickened. Taste and adjust the seasonings.
Video
Notes
Cooked prime rib will keep for 5-7 days in the refrigerator.