Peruvian Aji Verde: The Creamy Green Magic
Aji Verde is a modern Peruvian culinary classic. It combines fresh green jalapeños, cilantro, garlic, lime, mayonnaise, and cotija cheese into a stable, creamy sauce.
By blending the cotija cheese directly into the mayonnaise-lime base, you create a complex emulsion. The cheese proteins act as secondary stabilizers, locking in the green color and wrapping the chili heat in a creamy coat.
History & Origins
Originally prepared using yellow aji amarillo chilies and local herbs like huacatay. The modern green variant (using jalapeños or green aji) was popularized by rotisserie chicken houses in Lima.
The Science
Emulsion stabilization. Cotija cheese contains casein and fats that integrate into the oil droplets of the mayonnaise, yielding a thick, silky texture that won't break.
Technique
Blend the cilantro stems as well; they hold significant moisture and flavor, and a high-speed blender will puree them completely.
Common Mistakes
Using too much lime juice. Excessive acid will curdle the cheese proteins and thin out the mayonnaise emulsion.
Chef's Notes
If you cannot find Cotija cheese, a dry Feta cheese is the perfect substitute.