Grass Fed Sous Vide Beef Brisket Makes one 2.5 lb brisket. 4-6 servings Sous vide is great way to slow cook a grass fed beef brisket grass fed beef can have a lower fat content than grain fed beef so l I like to cook mine to lower temperatures for medium rare so that it does not end up overcooked and dry Brisket needs a longer cooking time to help the connective tissues break down and allow the meat to be tender and flavorful