Next Time You're At In-N-Out, Make This 3-Word Request To Double Your Portions - Tasting Table

"The 4x4 burger is a popular choice for those who want a higher protein-to-bun ratio, especially when skipping sides or sharing."

"Ordering a 4x4 is not gaming the system; it is part of In-N-Out's expected menu offerings, designed to meet customer preferences."

The 4x4 burger at In-N-Out consists of four beef patties and four slices of cheese, known as part of the 'not-so-secret menu.' It is not a loophole but an expected order that the kitchen can handle. A standard Double-Double has 610 calories, while a 4x4 is approximately 1050 calories. The 4x4 is ideal for those who are very hungry or prefer a higher protein-to-bun ratio. It can also be customized further with options like Animal Style or Protein Style.

Read at Tasting Table