Once the cookies have cooled, place the white chocolate chips in a double boiler over medium-low heat and melt, stirring ...

Use a large wooden spoon and large mixing bowl (or a stand mixer fitted with paddle attachment, on low speed) to cream butter with both types of sugar ... and chopped white chocolate, and mix ...

Melt the remaining white chocolate in a heat-proof bowl over a pan of barely simmering water or in the microwave on a low heat. Stir until smooth, then dip the cookies halfway into the white ...