Place the white chocolate chips into a microwave-safe bowl, and heat in the microwave in 30-second intervals, stirring well until the chocolate chips is fully melted and smooth.
Stir in the green food coloring and mix until it is fully green. Using a fork, fully coat each vanilla wafer cookie into the melted chocolate.
Set the cookies onto a plate, and decorate with the purple and gold sprinkles. Let sit until the chocolate has completely set.