Lots of flavor, and a nice change from just a regular burger. You can make these ahead of time and freeze them also. Serve on buns with all of your favorite toppings.
In a large bowl, mix together ground beef, sour cream, onion soup mix, bread crumbs and pepper using your hands. Refrigerate while you heat up the grill so the flavors have a chance to blend. Preheat a grill for medium heat. Form the ground beef into 8 balls, and flatten into patties. Grill patties for 6 to 8 minutes per side, or until well done.