Place sprinkles into a shallow bowl and put aside.
Place purple melting chocolate in a microwave safe bowl and melt in 30 second increments (stirring between each).
Dip rim of cup into melted chocolate.
Roll the chocolate rim in the bowl of sprinkles so it is completely covered.
Place ice cream, Oreos, vodka and 1/2 cup sprinkles in a blender. Blend until combined.
Pour mixture into sprinkled cup.
Add whipped cream and a sprinkle Oreo.