OREO CRUST - Prepare 12 paper baking cups. Put Oreo cookies in food processor and crumble them. Add melted butter and combine well. Put the mixture in the paper baking cups and press evenly, using a firm object, to get a solid layer. Leave in the fridge while you prepare cheesecake filling.

CHEESECAKE FILLING - Melt chocolate and leave it to cool. In a large bowl, mix heavy cream using electric mixer at a medium speed, for 3 minutes, then add vanilla extract and mix for one more minute at maximum speed. In a separate bowl, mix cream cheese with powdered sugar with electric mixer for about a minute. Combine it well with heavy cream. Divide the mixture in two bowls and add melted chocolate into one and combine well. Take baking cups out of the fridge. Spread brown filling evenly over the Oreo layer, using spoon. Put white filling over the brown one and spread evenly. Leave it in the fridge for 4 hours.

CHOCOLATE TOPPING - Put crumbled chocolate in a medium sized dish. When it melts, add sugar and heavy cream and mix well until the mixture is smooth. Take cheesecake cups out of the fridge and spread chocolate topping over each one of them. Decorate with chocolate sprinkles. Put back in the fridge for the chocolate to become solid.