Rinse your bowl clean and melt the white chocolate chips, stirring occasionally. Once melted, remove from heat and add pumpkin pie spice. Stir until thoroughly mixed.
Place pan in freezer to harden for at least 10-15 minutes.
In the microwave or over a double boiler, melt the dark chocolate, stirring occasionally. Once melted, pour over a cookie sheet and spread until even - should be a fairly thin layer.