I grind pork butt with my venison, 3 parts venison to 1 part pork butt. I also add meatloaf ingredients (egg, buttermilk, onion and breadcrumbs) to my burger before forming into patties for the grill. After grilling to taste as far a doneness I like to add one slice of american cheese and one slice of pepper jack, sea salt and coarse ground pepper and serve on a lightly toasted kaiser roll.