How can I brew a stronger cocoa drink?
You don't brew cocoa like coffee, with filtering. You drink the cocoa powder together with the liquid.
Making breed cocoa is super easy, just take a small pot, mix gradually the cocoa powder with cold water, them let it cook up like Turkish coffee. Then drink without any sieving or filtering. You can add sugar if you like.
If it is still watery, add more cocoa powder next time.