Aji Amarillo vs Habanero

Different species, different kitchens, and a shared Andean root. The Aji Amarillo is Capsicum baccatum. The habanero is Capsicum chinense. Carrizo Garcia and colleagues, sampling 34 of the roughly 35 Capsicum species for a 2016 study in Annals of Botany, place the origin of the genus along the Andes of western and northwestern South America, spreading clockwise around the Amazon basin and finally north into Central America, with the cultivated species arising in several regions along that path. Peru sits at the start of the story. Perry and colleagues reported in Science in 2007 that chili starch microfossils turn up at seven sites from the Bahamas to southern Peru, the oldest about 6,000 years old, alongside maize and in some places before pottery.

The Aji Amarillo stayed home. It is the backbone of Peruvian cooking, sold fresh, dried as aji mirasol, and as a bright paste that goes into aji de gallina, papa a la huancaina and a long list of table sauces. The name means yellow chili but the pods ripen to a deep golden orange. The flavor is the point: mango, passion fruit and dried apricot with a clean heat that builds and then leaves. The habanero traveled. It is tied to Mexico's Yucatan peninsula, where the Diario Oficial published a protected appellation of origin for the Chile Habanero de la Peninsula de Yucatan on June 4, 2010, covering Campeche, Quintana Roo and Yucatan. UF/IFAS still repeats the older account that the habanero began in Peru before spreading through Mexico, which fits the genus map even if the pepper's own path is undocumented.

The heat gap is roughly tenfold. This database puts the Aji Amarillo at 30,000 to 50,000 SHU and the habanero at 100,000 to 350,000. Bosland and Baral measured a standard orange habanero at 357,729 SHU in their 2005 Las Cruces trial. UF/IFAS describes the habanero's thin, waxy flesh and pods of 0.8 to 2.4 inches. The two are not substitutes on heat, and only partly on flavor. Both carry tropical fruit, but the habanero's is a floral apricot-citrus perfume that survives cooking, while the Aji Amarillo's reads as sweeter fruit with color to match.

Cooks swap them anyway, usually in one direction. A habanero can fill in for an Aji Amarillo in a Peruvian sauce at a fraction of the quantity, with a change of aroma and a paler color. Going the other way, Aji Amarillo in a habanero dish gives you a mild, golden version of it. Neither result is wrong. One pepper is built for flavor with heat attached and the other for heat with flavor attached.

Sources

• Carrizo Garcia et al., Annals of Botany 118(1), 2016: Phylogenetic relationships, diversification and expansion of chili peppers (Capsicum, Solanaceae)
• Perry et al., Science 315, 2007: Starch fossils and the domestication and dispersal of chili peppers (Capsicum spp. L.) in the Americas
• Bosland and Baral, HortScience 42(2), 2007: 'Bhut Jolokia', The World's Hottest Known Chile Pepper is a Putative Naturally Occurring Interspecific Hybrid
• Diario Oficial de la Federacion, 4 June 2010: Declaratoria de Proteccion de la Denominacion de Origen Chile Habanero de la Peninsula de Yucatan
• UF/IFAS Extension, HS-859: Pepper Production in Miami-Dade County, Florida