Melt chocolate in a microwave-safe bowl in 30-second intervals, stirring in between intervals.
Add some chocolate to the mold. Add in Oreo cookies and then add more chocolate over the top just filling out the mold. Place in the refrigerator for 10 minutes. Remove when hard.
Heat orange candy melts as directed on the bag and place into piping bag. Snip end and drizzle over the top. Immediately add fall sprinkles before candy melts dry.