Preheat the oven at 350 degrees. Line cookie sheets with parchment paper. Set aside.
Cream butter and sugars until light and fluffy.
Add the egg and milk. Stir to combine.
Using a spatula scrape the sides of the mixing bowl.
Whisk together the flour with the baking powder and salt and slowly add to the creamed mixture, mixing well.
Add the cranberries. Mixing well.
Using a medium size ice-cream scoop, drop cookie dough on the cookie sheets.
Bake at 350 degrees for 12-15 minutes or until golden brown.
Using a double boiler melt the white chocolate wafers. Stir often.
Allow for the cookies to cool slightly before moving them to a wire rack to cool completely.
Drizzle the melted white chocolate on the cookies with a spoon.
Leave the cookies on the wire rack until the chocolate is dry.