Aji Amarillo peppers, also known as Escabeche, aji verde, and aji cuzqueño, belong to the Capsicum Baccatum family of peppers. This pepper is part of the Peruvian trinity family of peppers, along with Aji Limo and Rocoto peppers. It's been grown since at least 6,500 B.C. and typically grows to 4 to 6 inches long.
In Spanish, the name aji amarillo translates to "yellow chili pepper," although it is usually more orange in color when ripe. Available as a pure powder or flakes.
It commonly has a Scoville Heat Rating of 30,000-50,000 Scoville Heat Units (SHU). Aji Amarillo peppers are a medium to hot chile pepper and similar to Scotch Bonnet peppers but with less heat, and have a fruity citrus-like flavor reminiscent of passion fruit and mango. They work well in Central and South American cuisines.