So they make the macaroni and cheese with SEMOLINA FLOUR AND EGG PASTA. That's one thing.
Then they make a roux with heavy cream but ALSO use sodium citrate to emulsify the cheese.
The cheese is sharp white cheddar and there's glutamates in the mix (MSG).
So make basic sharp white cheddar mac with a heavy cream and sharp white cheddar Mornay with sodium citrate and msg. Scale all ingredients accordingly.