Don't take the word 'devilled' lightly! These prawns are cooked in a super spicy sauce made with ketchup and chipotle chillies in adobo.
You can find authentic Mexican ingredients, such as tins of chipotle chillies in adobo sauce in Mexican grocers, speciality shops and online.
Holy chipotle! This is hot indeed but very good! I do have a couple of suggestions after making as written. The butter needs cut in half and lose the salt. The Maggi is plenty salty on its own. Other than that, this was perfect! - 13 Feb 2017 (Review from Allrecipes US | Canada)