A chilli pepper is the fruit from a plant called Capsicum. These plants originated in Puebla and Oaxaca more than 5000 years ago, but can be found today all over the world. Mexican chilli peppers are widely used in many cuisines as a spice to add heat to dishes. You can buy them in supermarkets and vegetable stores in various shapes, sizes and colours. Mexican peppers have very little aroma, but their taste can vary between very mild to incredibly fiery and hot!