Standing Prime Rib Roast with Creamy Horseradish Sauce Recipe - EntertainingCouple.com

Ingredients

• 7 – 8 pound prime rib roast (A good rule of thumb is to plan on 1 bone per 2 people. That can equate to about 10 ounces of cooked prime rib per person.)
• 1/2 cup butter, at room temperature (soft, but not melted)
• 4 garlic cloves, minced
• 1/4 onion, minced
• 1 teaspoon black pepper
• 1 tablespoon dried thyme
• 1/2 tablespoon dried savory
• 1 teaspoon dried oregano
• 1 teaspoon dried rosemary
• Kosher salt
• 1/2 cup mayonnaise
• 3 tablespoons prepared horseradish (or to taste)
• 1 tablespoon lemon juice
• 2 teaspoons Dijon-style mustard
• 1/2 cup sour cream