Brown Sugar Steakhouse Meatloaf

Name: Brown Sugar Steakhouse Meatloaf
Ingredients: * 1/2 cup packed dark brown sugar; * 1/4 cup spicy brown mustard; * for meatloaf mixture:; * 2 lb extra lean ground beef; * 1 packet dry onion soup and dip mix such a lipton's recipe secret; * 1/2 cup whole milk; * 1/3 cup steak sauce such a a1 original; * 1/4 cup heavy mayo; * 2 egg, beaten; * 3/4 cup seasoned breadcrumb; * 1/2 tbl jarred extra hot horseradish; * 1/2 tbl spicy brown mustard; * 1 tsp garlic powder; * 1/2 tsp coarse ground black pepper; * for top:; * 1 more tbl steak sauce for top mixed with 1/2 tsp dark brown