A great alternative to scotch bonnet peppers is habaneros. They have a similar bright, spicy flavor and are often used as a substitute for scotch bonnets. Habaneros are slightly less intense than scotch bonnet peppers; on the Scoville scale, they measure between 100,000 and 350,000 SHU (Scoville heat units). As a comparison, scotch bonnets clock in at around 100,000 to 350,000 SHU, depending on the variety. If you're looking for a milder option still packed with flavor, then red jalapeno peppers might be your best bet! These come in at around 2,500-8,000 SHU. Another great alternative is cayenne pepper which measures 30,000–50,00 SHU. All of these alternatives can work well in recipes that call for scotch bonnet peppers, although you may need to modify the quantity to get the desired spiciness level.