I use Hersheys 100% cacao powder and add it to cream cheese with a little sweetner. I also whip cream cheese and heavy cream together and make little chocolate cheese cakes. My latest thing is powdered peanut butter with chocolate added. I love that with whipped heavy cream or cream cheese. The secret, in my opinion is to measure and record so you don't eat too much.

You can also melt butter sweetner and cocoa powder then let it cool. But that is too rich for me.