Certified wagyu beef is perhaps the most expensive beef in the world the cattle are fed specially developed grain mix for around 400 days to ensure that their tender meat is packed with flavourrone of the distinct features of wagyu beef is its marbling the wagyu beefrsquos extensive marbling effect is created by ribbons of fat that run through the meat itrsquos this high fat content which makes wagyu steak so succulent and tenderrwagyu is graded from 1 to 12 depending on the amount of m