Yes, you can use a different type of nut butter as a substitute for sesame paste in Bang Bang Chicken, such as peanut butter, almond butter, or cashew butter. When substituting with a different nut butter, keep in mind that the flavor and texture of the sauce may vary slightly from the traditional sesame paste-based version. Adjust the quantities and taste as you go, and consider adding a small amount at a time until you achieve the desired flavor profile.