Trader Joe’s Kobe Beef burgers at Trader Joe’s? YES! 100% American raised Kobe Beef (also known as Wagyu Beef) makes for a juicy, flavorful, steak-like burder. You can find boxes of two 8oz hamburger patties in the frozen aisle. Careful, though, one patty is 600 calories and 56g of fat. This is definitely for that special cookout with friends.