Considering my recent obsession with dark chocolate and my fondness of peanut butter, it’s only natural that I should want to eat them together. With Reese’s as my model, I’ve been making my own chocolate peanut butter cups, and it goes like this:
Using a double boiler (to avoid scorching), melt some nice dark chocolate. Into a little candy cup, spoon just enough chocolate to cover the bottom of the cup. Let the chocolate cool down and solidify (faster if you put it in the fridge). While you are waiting, mix some peanut butter with a bit of honey. I use natural peanut butter (100% peanuts), and the honey helps stiffen it so it is easier to control when adding it to the cup. When the chocolate base has set, spoon in a small ball of the peanut butter mixture and press down to spread it into a disc shape, keeping it slightly away from the side of the cup. Then pour in some more melted chocolate so it surrounds and covers the peanut butter. Let cool. Presto, delicious peanut butter cups, guaranteed to please!
A word of caution: don’t be too disappointed if people refuse to believe that you made these all by yourself!
Dale Sorensen's Blog 
Would it work with brown sugar instead of honey? I’d love to make them for Claire, and being strictly vegan, she doesn’t eat honey. They sound awesome!!!
I don’t know if brown sugar would work or not – no harm to try a little bit and see what happens! Another liquid sweetener would certainly stiffen the peanut butter – something like brown rice syrup or agave syrup. Even corn syrup. Molasses would also work, but I think its flavour would end up dominating.
I have made them without adding any sweetner/thickener to the peanut butter. It still works and they are yummy.