Fairly new

Hi there a buddy and I have recently started brewing beer and are enjoying it a lot.  We started with simple store bought kits and are gradually decided to make are own recipes we are working and chocolate banana beer my question is what would you recomend using to get a small chocolate after taste as we have already gotten a  good banana taste of our last batch. Thanks in advance.

Caco nibs in the secondary is what lots of folks use for chocolate flavor

ok thanks alot