I'm having a "duh" moment. How do you get the sprinkles to stick to the Oreos after they are molded?
Hmm, never did oreo's yet waiting on my molds to come in. But next time could you try putting the sprinkles down first, than chocolate, cookie, and more chocolate?
After you've molded the Oreo, melt some more chocolate. Lightly brush the melted chocolate on the top of the Oreo and sprinkle away!