In a medium sized sauce pan, beat together your egg yolks, evaporated milk and vanilla until well combined.
Add in the sugar and butter and heat over the stove top on medium high heat for about 15 minutes. Stir constantly for the last 10 minutes or so once mixture is boiling.
Stir in your coconut flakes and chopped pecans.
Allow to cool for about 5 minutes before spreading some on top of each cookie.
Allow to cool completely.
Melt your chocolate chips in a small bowl in the microwave in 30 second increments, stirring after each, till smooth.
Put melted chocolate in a small ziplock bag. Clip the corner of the bag.
Drizzle the chocolate over the top in a zig zag pattern.
Allow chocolate to harden and enjoy.