Yes, microdosing chocolate is an excellent and very popular way to microdose psilocybin. Depending on the amount of psilocybin in a chocolate bar you will need to portion accordingly. 3 Amigos makes a 3g psilocybin chocolate bar that can be portioned into 12 squares for a 250 mg microdose. https://3amigos.co/product/60-dark-chocolate-organic/.