In a small saucepan bring heavy cream to a simmer. Put white chocolate chips in a bow, then pour heavy cream over white chocolate chips and let sit for 1 minute. Stir melted white chocolate chips and cream until smooth & creamy. Add blue food coloring to reach desired color (optional). Put bowl in refrigerator and chill for 45 minutes – 1 hour until set, stirring occasionally. Spread white chocolate layer over sugar cookie layer until evenly spread.