so to do this achievement u need to this on the map Benny's Burger Bar.and is the best to play on the long mode because it's going to take a long time.

so in the map u need to get 20 ingredients ,cook all of them ,then u need to grab a plate and make the burger. Then take a order,give the customer the plate with the burger and them should say "This isn't what I ordered" and the achievement should pop.s