The subject of this lesson is ‘The Scoville Scale’. In 1912, Wilbur Scoville created this scale to measure the heat in different chillies. The scale measures the amount of ‘capsaicin’ in the chilli, (the bit that makes it spicy). At the top of the scale, you’ve got the Trinidad Moruga Scorpion Chilli (!) at 2,000,000 Scoville Units, whilst the jalapeño (star of this recipe) is only 3,500 Units. However, if you’re sensitive to heat we still recommend you go easy on the spice!