I just made some for the first time last night. I made a half batch of mmf and used around 2 oz. of chocolate that I melted and added while the mmf was mixing. All I had was some Dove milk chocolates and they still worked great. I didn't really measure but I did add a few teaspoons of cocoa powder hoping to get it a darker brown color. My mmf turned out a lot lighter brown than I would have liked but it is probably from using milk chocolate. It is great, it tastes like tootsie rolls!!! Sorry I'm not much help with exact measurments.
Another tip to make it darker: use Hershey's Special Dark cocoa powder. It makes it a nice brown. I used it on the cake in my gallery that is the "blue & brown cake for fun".
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