Adding ceremonial cacao and a mild MAOI like caapi or passionflower to a truffle ceremony is often reported to deepen and shift the tone of the experience. Responses vary from person to person, and I cannot verify specific outcomes.
Cacao contains compounds such as theobromine and phenylethylamine that many people experience as gently stimulating and heart opening, sometimes with a brighter mood and a stronger sense of connection. It can also feel edgy for some, with possible nausea or overstimulation.
MAO-inhibiting plants like caapi or passionflower may slow the breakdown of psilocybin, which can lead to a longer, more intense and introspective journey with amplified emotions and imagery. They can also increase sensitivity to other substances, so careful screening and supervision are important.
If you are exploring this option, discuss your intentions and sensitivities with an experienced facilitator and use a thorough intake. For context about guided group work, see this truffle ceremony overview: truffle ceremony.
Hope this clarifies the potential effects.