I've been experimenting with organic extra-virgin coconut oil. Lots of good things about it I've heard, good saturated fats, etc. I tried making chocolate truffle type things with it and the combination of the flavor of cocoa and coconut oil is amazing.
I haven't perfected it yet, but so far I've mixed one cup of cocoa, a half-cup of coconut oil (I had to put the jar in some hot water to liquify the oil), a tablespoon vanilla extract, a dash or two of salt (a little salt, just below the level where you notice it, really improves the flavor of chocolate), and sweetener. In my case I sweetened it with xylitol and a little honey but xylitol only would work fine. Mix well and form into shapes and cool. They came out like strong dark chocolate.
The next thing I'm going to try is mixing in some coconut milk to make milk chocolate.
One thing to remember: make sure your dog doesn't get ahold of these. Xylitol can be deadly to dogs and chocolate is bad for them too.
Edit: After a lot of experimentation, I have added a cup of coconut milk to make it more milky, and the salt can be between 1/8 and 1/4 teaspoon. For sweetening I have been using a half to a whole dropperful of stevia extract. The coconut oil is warmed to liquify, then added to the dry ingredients, vanilla and stevia, then stirred until totally mixed. Then I add the coconut milk and stir. It will usually solidify at this point, if you like it with a rougher texture you can spoon it onto a plate with plastic wrap on it and refrigerate. I have lately been gently reheating the mixture in a double boiler arrangement to liquify it again, then mix well and let cool a bit, then spoon dollops onto the plate covered with plastic wrap.